This example cancels the drawing of new objects when the mouse is over a certain area on the viewer.

Visual Basic

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Private Sub AnnAutomation_Cancel()    ' subclass to the viewer mouse move event    ' _automation is an AnnAutomation object    AddHandler _automation.Container.MouseMove, AddressOf Container_MouseMove End Sub Private Sub Container_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)    ' check if we have a draw designer currently selected    If Not _automation.CurrentDesigner Is Nothing AndAlso TypeOf _automation.CurrentDesigner Is AnnDrawDesigner Then       ' check if we are over the rectangle 100,100 to 200,200       Dim rc As Rect = New Rect(100, 100, 100, 100)       If rc.Contains(e.GetPosition(_automation.Container)) Then          _automation.Cancel()       End If    End If End Sub

C#

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private void AnnAutomation_Cancel()  {     // subclass to the viewer mouse move event     // _automation is an AnnAutomation object     _automation.Container.MouseMove += new MouseEventHandler(Container_MouseMove);  }  private void Container_MouseMove(object sender, MouseEventArgs e)  {     // check if we have a draw designer currently selected     if(_automation.CurrentDesigner != null && _automation.CurrentDesigner is AnnDrawDesigner)     {        // check if we are over the rectangle 100,100 to 200,200        Rect rc = new Rect(100, 100, 100, 100);        if(rc.Contains(e.GetPosition(_automation.Container)))           _automation.Cancel();     }  }

• (Design user mode) An AnnDrawDesigner is drawing a new object
• (Design user mode) An AnnEditDesigner is editing an existing object
• (Design user mode) The user is selecting a group of objects
• (Run user mode) An AnnRunDesigner is running an object

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, and Windows Server 2003 family

Reference