Assembly: System.Design (in system.design.dll)
'Declaration Public NotInheritable Class DesignerRegionMouseEventArgs Inherits EventArgs 'Usage Dim instance As DesignerRegionMouseEventArgs
The ViewEvent event is raised by the designer host for certain actions on a control on the design surface. For example, an event is raised when you click a selected control or a designer region in a selected control on the design surface.
The ControlDesigner class supplies a default delegate to handle the ViewEvent event. When you click a selected control or a designer region of a selected control at design time, the designer host initializes a ViewEventArgs object for a Click event type, and then sets the EventArgs property with a DesignerRegionMouseEventArgs object.
When the ViewEventArgs object indicates that you clicked a designer region, the default delegate in the ControlDesigner class passes the DesignerRegionMouseEventArgs object to the OnClick method. Classes deriving from the ControlDesigner class override the OnClick method to process events that are raised when you click a control in the design host.
For more information about events and delegates, see Events and Delegates.
The following code example shows how to use the DesignerRegionMouseEventArgs to identify the region that was clicked and to change the view accordingly. This example is part of a larger example provided for the EditableDesignerRegion class.
' Handler for the Click event, which provides the region in the arguments. Protected Overrides Sub OnClick(ByVal e As DesignerRegionMouseEventArgs) If IsNothing(e.Region) Then Return End If ' If the clicked region is not a header, return If e.Region.Name.IndexOf("Header") <> 0 Then Return End If ' Switch the current view if required If e.Region.Name.Substring(6, 1) <> myControl.CurrentView.ToString() Then myControl.CurrentView = Integer.Parse(e.Region.Name.Substring(6, 1)) MyBase.UpdateDesignTimeHtml() End If End Sub
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.