ActiveDesignerEventArgs Class

Provides data for the ActiveDesigner event.

Namespace: System.ComponentModel.Design
Assembly: System (in system.dll)

Public Class ActiveDesignerEventArgs
	Inherits EventArgs
Dim instance As ActiveDesignerEventArgs

public class ActiveDesignerEventArgs extends EventArgs
public class ActiveDesignerEventArgs extends EventArgs
Not applicable.

The ActiveDesigner event occurs when the currently active document changes. The active document changes when a new document is created, an existing document is opened, or a document is closed.

When you create an ActiveDesignerEventArgs delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.


The HostProtectionAttribute attribute applied to this class has the following Resources property value: SharedState. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

The following example method returns an ActiveDesignerEventArgs that contains a specified reference to the IDesignerHost for the designer losing focus and a specified reference to the IDesignerHost for the designer gaining focus.

Public Function CreateActiveDesignerEventArgs(ByVal losingFocus As IDesignerHost, ByVal gainingFocus As IDesignerHost) As ActiveDesignerEventArgs
    Dim e As New ActiveDesignerEventArgs(losingFocus, gainingFocus)
    Return e
End Function

public ActiveDesignerEventArgs CreateActiveDesignerEventArgs(
    IDesignerHost losingFocus, IDesignerHost gainingFocus)
    ActiveDesignerEventArgs e = new ActiveDesignerEventArgs(losingFocus,
    return e;
} //CreateActiveDesignerEventArgs


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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