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<Type Name="MessageBox" FullName="System.Windows.Forms.MessageBox">
<TypeSignature Language="C#" Value="public class MessageBox" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit MessageBox extends System.Object" />
<TypeSignature Language="DocId" Value="T:System.Windows.Forms.MessageBox" />
<TypeSignature Language="VB.NET" Value="Public Class MessageBox" />
<TypeSignature Language="F#" Value="type MessageBox = class" />
<TypeSignature Language="C++ CLI" Value="public ref class MessageBox" />
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
<AssemblyVersion>11.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>System.Object</BaseTypeName>
</Base>
<Interfaces />
<Attributes>
<Attribute FrameworkAlternate="windowsdesktop-10.0;windowsdesktop-11.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(0)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(0)>]</AttributeName>
</Attribute>
</Attributes>
<Docs>
<summary>Displays a message window, also known as a dialog box, which presents a message to the user. It is a modal window, blocking other actions in the application until the user closes it. A <see cref="T:System.Windows.Forms.MessageBox" /> can contain text, buttons, and symbols that inform and instruct the user.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You cannot create a new instance of the <xref:System.Windows.Forms.MessageBox> class. To display a message box, call the `static` method <xref:System.Windows.Forms.MessageBox.Show%2A?displayProperty=nameWithType>. The title, message, buttons, and icons displayed in the message box are determined by parameters that you pass to this method.
## Examples
The following code example shows how to use a <xref:System.Windows.Forms.MessageBox> to inform the user of a missing entry in a <xref:System.Windows.Forms.TextBox>. This example requires that the method is called from an existing form with a <xref:System.Windows.Forms.TextBox> named **ServerName** on it.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet1":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet1":::
The following code example shows how to ask the user a yes or no question and make a decision based on the response.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/Classic MessageBox Example/CPP/source.cpp" id="Snippet1":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/MessageBox/Overview/source.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/MessageBox/Overview/source.vb" id="Snippet1":::
]]></format>
</remarks>
<altmember cref="M:System.Windows.Forms.MessageBox.Show(System.String,System.String,System.Windows.Forms.MessageBoxButtons,System.Windows.Forms.MessageBoxIcon,System.Windows.Forms.MessageBoxDefaultButton,System.Windows.Forms.MessageBoxOptions,System.Boolean)" />
</Docs>
<Members>
<MemberGroup MemberName="Show">
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Docs>
<summary>Displays a message box.</summary>
</Docs>
</MemberGroup>
<Member MemberName="Show">
<MemberSignature Language="C#" Value="public static System.Windows.Forms.DialogResult Show (string text);" FrameworkAlternate="netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0" />
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<MemberSignature Language="VB.NET" Value="Public Shared Function Show (text As String) As DialogResult" />
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 static System::Windows::Forms::DialogResult Show(System::String ^ text);" />
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<MemberType>Method</MemberType>
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<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>System.Windows.Forms.DialogResult</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="text" Type="System.String" />
</Parameters>
<Docs>
<param name="text">The text to display in the message box.</param>
<summary>Displays a message box with specified text.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
By default, the message box displays an **OK** button. The message box does not contain a caption in the title.
## Examples
The following code example displays a simple message box.
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet6":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet6":::
]]></format>
</remarks>
</Docs>
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<ReturnValue>
<ReturnType>System.Windows.Forms.DialogResult</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="text" Type="System.String" />
<Parameter Name="caption" Type="System.String" />
</Parameters>
<Docs>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<summary>Displays a message box with specified text and caption.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
By default, the message box displays an **OK** button.
]]></format>
</remarks>
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<Member MemberName="Show">
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 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text);" />
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<Parameters>
<Parameter Name="owner" Type="System.Windows.Forms.IWin32Window" />
<Parameter Name="text" Type="System.String" />
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<Docs>
<param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
<param name="text">The text to display in the message box.</param>
<summary>Displays a message box in front of the specified object and with the specified text.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can use the `owner` parameter to specify a particular object, which implements the <xref:System.Windows.Forms.IWin32Window> interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
By default, the message box displays an **OK** button. The message box does not contain a caption in the title.
]]></format>
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<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<summary>Displays a message box with specified text, caption, and buttons.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates how to display a <xref:System.Windows.Forms.MessageBox> with the options supported by this overload of <xref:System.Windows.Forms.MessageBox.Show%2A>. After verifying that a string variable, `ServerName`, is empty, the example displays a <xref:System.Windows.Forms.MessageBox>, offering the user the option to cancel the operation. If the <xref:System.Windows.Forms.MessageBox.Show%2A> method's return value evaluates to <xref:System.Windows.Forms.DialogResult.Yes>, the form that displayed the <xref:System.Windows.Forms.MessageBox> is closed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet1":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet1":::
]]></format>
</remarks>
<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">The <paramref name="buttons" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
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<param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
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## Remarks
You can use the `owner` parameter to specify a particular object, which implements the <xref:System.Windows.Forms.IWin32Window> interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
By default, the message box displays an **OK** button.
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<Docs>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
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<format type="text/markdown"><![CDATA[
## Remarks
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates one of the <xref:System.Windows.Forms.MessageBox.Show%2A> methods when handling the <xref:System.Windows.Forms.ComboBox.DropDown?displayProperty=nameWithType> event. To run the example, paste the following code in a form and call the `InitializeComboBox` method from the form's constructor or `Load` method.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/System.Windows.Forms.ComboBoxDropDown/CPP/form1.cpp" id="Snippet2":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/ComboBox+ObjectCollection/AddRange/form1.cs" id="Snippet2":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/ComboBox+ObjectCollection/AddRange/form1.vb" id="Snippet2":::
]]></format>
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<Docs>
<param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
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<format type="text/markdown"><![CDATA[
## Remarks
You can use the `owner` parameter to specify a particular object, which implements the <xref:System.Windows.Forms.IWin32Window> interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates how to display a <xref:System.Windows.Forms.MessageBox> with the options supported by this overload of <xref:System.Windows.Forms.MessageBox.Show%2A>. After verifying that a string variable, `ServerName`, is empty, the example displays a <xref:System.Windows.Forms.MessageBox>, offering the user the option to cancel the operation. If the <xref:System.Windows.Forms.MessageBox.Show%2A> method's return value evaluates to <xref:System.Windows.Forms.DialogResult.Yes>, the form that displayed the <xref:System.Windows.Forms.MessageBox> is closed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet5":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet5":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet5":::
]]></format>
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<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
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<format type="text/markdown"><![CDATA[
## Remarks
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates how to display a <xref:System.Windows.Forms.MessageBox> with the options supported by this overload of <xref:System.Windows.Forms.MessageBox.Show%2A>. After verifying that a string variable, `ServerName`, is empty, the example displays a <xref:System.Windows.Forms.MessageBox> with a question box icon, offering the user the option to cancel the operation. If the <xref:System.Windows.Forms.MessageBox.Show%2A> method's return value evaluates to <xref:System.Windows.Forms.DialogResult.Yes>, the form that displayed the <xref:System.Windows.Forms.MessageBox> is closed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet3":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet3":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet3":::
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<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
<paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.
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<paramref name="defaultButton" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
<altmember cref="T:System.Windows.Forms.MessageBoxIcon" />
<altmember cref="T:System.Windows.Forms.MessageBoxDefaultButton" />
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<Parameter Name="text" Type="System.String" />
<Parameter Name="caption" Type="System.String" />
<Parameter Name="buttons" Type="System.Windows.Forms.MessageBoxButtons" />
<Parameter Name="icon" Type="System.Windows.Forms.MessageBoxIcon" />
</Parameters>
<Docs>
<param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
<summary>Displays a message box in front of the specified object and with the specified text, caption, buttons, and icon.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can use the `owner` parameter to specify a particular object, which implements the <xref:System.Windows.Forms.IWin32Window> interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates how to display a <xref:System.Windows.Forms.MessageBox> with the options supported by this overload of <xref:System.Windows.Forms.MessageBox.Show%2A>. After verifying that a string variable, `ServerName`, is empty, the example displays a <xref:System.Windows.Forms.MessageBox>, offering the user the option to cancel the operation. If the <xref:System.Windows.Forms.MessageBox.Show%2A> method's return value evaluates to <xref:System.Windows.Forms.DialogResult.Yes>, the form that displayed the <xref:System.Windows.Forms.MessageBox> is closed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet4":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet4":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet4":::
]]></format>
</remarks>
<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
<paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.
-or-
<paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
<altmember cref="T:System.Windows.Forms.MessageBoxIcon" />
</Docs>
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<Parameter Name="caption" Type="System.String" />
<Parameter Name="buttons" Type="System.Windows.Forms.MessageBoxButtons" />
<Parameter Name="icon" Type="System.Windows.Forms.MessageBoxIcon" />
<Parameter Name="defaultButton" Type="System.Windows.Forms.MessageBoxDefaultButton" />
<Parameter Name="options" Type="System.Windows.Forms.MessageBoxOptions" />
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<Docs>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
<param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values that specifies the default button for the message box.</param>
<param name="options">One of the <see cref="T:System.Windows.Forms.MessageBoxOptions" /> values that specifies which display and association options will be used for the message box. You may pass in 0 if you wish to use the defaults.</param>
<summary>Displays a message box with the specified text, caption, buttons, icon, default button, and options.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates how to display a <xref:System.Windows.Forms.MessageBox> with the options supported by this overload of <xref:System.Windows.Forms.MessageBox.Show%2A>. After verifying that a string variable, `ServerName`, is empty, the example displays a <xref:System.Windows.Forms.MessageBox> with a question box icon, offering the user the option to cancel the operation. The example uses the <xref:System.Windows.Forms.MessageBoxOptions.RightAlign> member of the <xref:System.Windows.Forms.MessageBoxOptions> enumeration to align the text to the right edge of the dialog box. If the <xref:System.Windows.Forms.MessageBox.Show%2A> method's return value evaluates to <xref:System.Windows.Forms.DialogResult.Yes>, the form that displayed the <xref:System.Windows.Forms.MessageBox> is closed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet2":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet2":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet2":::
]]></format>
</remarks>
<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
<paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.
-or-
<paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.
-or-
The <paramref name="defaultButton" /> specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<exception cref="T:System.ArgumentException">
<paramref name="options" /> specified both <see cref="F:System.Windows.Forms.MessageBoxOptions.DefaultDesktopOnly" /> and <see cref="F:System.Windows.Forms.MessageBoxOptions.ServiceNotification" />.
-or-
<paramref name="buttons" /> specified an invalid combination of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
<altmember cref="T:System.Windows.Forms.MessageBoxIcon" />
<altmember cref="T:System.Windows.Forms.MessageBoxDefaultButton" />
<altmember cref="T:System.Windows.Forms.MessageBoxOptions" />
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<Parameter Name="owner" Type="System.Windows.Forms.IWin32Window" />
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<Parameter Name="caption" Type="System.String" />
<Parameter Name="buttons" Type="System.Windows.Forms.MessageBoxButtons" />
<Parameter Name="icon" Type="System.Windows.Forms.MessageBoxIcon" />
<Parameter Name="defaultButton" Type="System.Windows.Forms.MessageBoxDefaultButton" />
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<Docs>
<param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
<param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values that specifies the default button for the message box.</param>
<summary>Displays a message box in front of the specified object and with the specified text, caption, buttons, icon, and default button.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can use the `owner` parameter to specify a particular object, which implements the <xref:System.Windows.Forms.IWin32Window> interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
You can have a maximum of three buttons on the message box.
## Examples
The following code example demonstrates how to display a <xref:System.Windows.Forms.MessageBox> with the options supported by this overload of <xref:System.Windows.Forms.MessageBox.Show%2A>. After verifying that a string variable, `ServerName`, is empty, the example displays a <xref:System.Windows.Forms.MessageBox>, offering the user the option to cancel the operation. If the <xref:System.Windows.Forms.MessageBox.Show%2A> method's return value evaluates to <xref:System.Windows.Forms.DialogResult.Yes>, the form that displayed the <xref:System.Windows.Forms.MessageBox> is closed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/MessageBox.Show Variations/CPP/form1.cpp" id="Snippet2":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/DialogResult/Overview/form1.cs" id="Snippet2":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/DialogResult/Overview/form1.vb" id="Snippet2":::
]]></format>
</remarks>
<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
<paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.
-or-
<paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.
-or-
<paramref name="defaultButton" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
<altmember cref="T:System.Windows.Forms.MessageBoxIcon" />
<altmember cref="T:System.Windows.Forms.MessageBoxDefaultButton" />
</Docs>
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<Parameters>
<Parameter Name="text" Type="System.String" Index="0" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="caption" Type="System.String" Index="1" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="buttons" Type="System.Windows.Forms.MessageBoxButtons" Index="2" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="icon" Type="System.Windows.Forms.MessageBoxIcon" Index="3" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="defaultButton" Type="System.Windows.Forms.MessageBoxDefaultButton" Index="4" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="options" Type="System.Windows.Forms.MessageBoxOptions" Index="5" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="displayHelpButton" Type="System.Boolean" Index="6" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
</Parameters>
<Docs>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
<param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values that specifies the default button for the message box.</param>
<param name="options">One of the <see cref="T:System.Windows.Forms.MessageBoxOptions" /> values that specifies which display and association options will be used for the message box. You may pass in 0 if you wish to use the defaults.</param>
<param name="displayHelpButton">
<see langword="true" /> to show the Help button; otherwise, <see langword="false" />. The default is <see langword="false" />.</param>
<summary>Displays a message box with the specified text, caption, buttons, icon, default button, options, and Help button.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
When the user clicks the Help button, the form that owns the message box (or the active form) receives the <xref:System.Windows.Forms.Control.HelpRequested> event. Handle the <xref:System.Windows.Forms.Control.HelpRequested> event to perform custom Help actions.
## Examples
The following code example demonstrates how to show a message box with a Help button, handle the <xref:System.Windows.Forms.Control.HelpRequested?displayProperty=nameWithType> event, and show a custom help window in response to the event.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/System.Windows.Forms.MessageBox with Help/CPP/form1.cpp" id="Snippet1":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/MessageBox/Show/form1.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/MessageBox/Show/form1.vb" id="Snippet1":::
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/System.Windows.Forms.MessageBox with Help/CPP/form1.cpp" id="Snippet2":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/MessageBox/Show/form1.cs" id="Snippet2":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/MessageBox/Show/form1.vb" id="Snippet2":::
]]></format>
</remarks>
<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
<paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.
-or-
<paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.
-or-
The <paramref name="defaultButton" /> specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<exception cref="T:System.ArgumentException">
<paramref name="options" /> specified both <see cref="F:System.Windows.Forms.MessageBoxOptions.DefaultDesktopOnly" /> and <see cref="F:System.Windows.Forms.MessageBoxOptions.ServiceNotification" />.
-or-
<paramref name="buttons" /> specified an invalid combination of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
<altmember cref="T:System.Windows.Forms.MessageBoxIcon" />
<altmember cref="T:System.Windows.Forms.MessageBoxDefaultButton" />
<altmember cref="T:System.Windows.Forms.MessageBoxOptions" />
</Docs>
</Member>
<Member MemberName="Show">
<MemberSignature Language="C#" Value="public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath);" FrameworkAlternate="netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0" />
<MemberSignature Language="ILAsm" Value=".method public static hidebysig valuetype System.Windows.Forms.DialogResult Show(string text, string caption, valuetype System.Windows.Forms.MessageBoxButtons buttons, valuetype System.Windows.Forms.MessageBoxIcon icon, valuetype System.Windows.Forms.MessageBoxDefaultButton defaultButton, valuetype System.Windows.Forms.MessageBoxOptions options, string helpFilePath) cil managed" />
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<MemberSignature Language="VB.NET" Value="Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String) As DialogResult" />
<MemberSignature Language="F#" Value="static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string -> System.Windows.Forms.DialogResult" Usage="System.Windows.Forms.MessageBox.Show (text, caption, buttons, icon, defaultButton, options, helpFilePath)" />
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 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath);" />
<MemberSignature Language="C#" Value="public static System.Windows.Forms.DialogResult Show (string? text, string? caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath);" FrameworkAlternate="windowsdesktop-10.0;windowsdesktop-11.0;windowsdesktop-8.0;windowsdesktop-9.0" />
<MemberType>Method</MemberType>
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<AssemblyName>System.Windows.Forms</AssemblyName>
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<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
<AssemblyVersion>11.0.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>System.Windows.Forms.DialogResult</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="text" Type="System.String" Index="0" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="caption" Type="System.String" Index="1" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="buttons" Type="System.Windows.Forms.MessageBoxButtons" Index="2" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="icon" Type="System.Windows.Forms.MessageBoxIcon" Index="3" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="defaultButton" Type="System.Windows.Forms.MessageBoxDefaultButton" Index="4" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="options" Type="System.Windows.Forms.MessageBoxOptions" Index="5" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0" />
<Parameter Name="helpFilePath" Type="System.String" Index="6" FrameworkAlternate="net-5.0;net-6.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0;netframework-4.8.1;windowsdesktop-8.0;windowsdesktop-9.0;windowsdesktop-10.0;windowsdesktop-11.0">
<Attributes>
<Attribute FrameworkAlternate="windowsdesktop-10.0;windowsdesktop-11.0;windowsdesktop-8.0;windowsdesktop-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(1)>]</AttributeName>
</Attribute>
</Attributes>
</Parameter>
</Parameters>
<Docs>
<param name="text">The text to display in the message box.</param>
<param name="caption">The text to display in the title bar of the message box.</param>
<param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
<param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
<param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values that specifies the default button for the message box.</param>
<param name="options">One of the <see cref="T:System.Windows.Forms.MessageBoxOptions" /> values that specifies which display and association options will be used for the message box. You may pass in 0 if you wish to use the defaults.</param>
<param name="helpFilePath">The path and name of the Help file to display when the user clicks the Help button.</param>
<summary>Displays a message box with the specified text, caption, buttons, icon, default button, options, and Help button, using the specified Help file.</summary>
<returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
When the user clicks Help button, the Help file specified in the `helpFilePath` parameter is opened. The form that owns the message box (or the active form) also receives the <xref:System.Windows.Forms.Control.HelpRequested> event.
The `helpFilePath` parameter can be of the form C:\path\sample.chm or /folder/file.htm.
## Examples
The following code example demonstrates how to show a message box with a Help button. When the user clicks the Help button, the `Mspaint.chm` Help file is opened. The example requires that the `Mspaint.chm` Help file is installed.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/System.Windows.Forms.MessageBox with Help/CPP/form1.cpp" id="Snippet1":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/MessageBox/Show/form1.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/MessageBox/Show/form1.vb" id="Snippet1":::
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/System.Windows.Forms.MessageBox with Help/CPP/form1.cpp" id="Snippet3":::
:::code language="csharp" source="~/snippets/csharp/System.Windows.Forms/MessageBox/Show/form1.cs" id="Snippet3":::
:::code language="vb" source="~/snippets/visualbasic/System.Windows.Forms/MessageBox/Show/form1.vb" id="Snippet3":::
]]></format>
</remarks>
<exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
<paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.
-or-
<paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.
-or-
The <paramref name="defaultButton" /> specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
<exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
<exception cref="T:System.ArgumentException">
<paramref name="options" /> specified both <see cref="F:System.Windows.Forms.MessageBoxOptions.DefaultDesktopOnly" /> and <see cref="F:System.Windows.Forms.MessageBoxOptions.ServiceNotification" />.
-or-
<paramref name="buttons" /> specified an invalid combination of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
<altmember cref="T:System.Windows.Forms.MessageBoxButtons" />
<altmember cref="T:System.Windows.Forms.MessageBoxIcon" />
<altmember cref="T:System.Windows.Forms.MessageBoxDefaultButton" />
<altmember cref="T:System.Windows.Forms.MessageBoxOptions" />
</Docs>
</Member>
<Member MemberName="Show">
<MemberSignature Language="C#" Value="public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options);" FrameworkAlternate="netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;windowsdesktop-3.0;windowsdesktop-3.1;windowsdesktop-5.0;windowsdesktop-6.0;windowsdesktop-7.0" />
<MemberSignature Language="ILAsm" Value=".method public static hidebysig valuetype System.Windows.Forms.DialogResult Show(class System.Windows.Forms.IWin32Window owner, string text, string caption, valuetype System.Windows.Forms.MessageBoxButtons buttons, valuetype System.Windows.Forms.MessageBoxIcon icon, valuetype System.Windows.Forms.MessageBoxDefaultButton defaultButton, valuetype System.Windows.Forms.MessageBoxOptions options) cil managed" />
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<MemberSignature Language="VB.NET" Value="Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions) As DialogResult" />
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 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options);" />
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