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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Public Sub AnnAutomation_Cancel()    ' subclass to the viewer mouse move event    ' _automation is an AnnAutomation object    AddHandler _automation.Viewer.MouseMove, AddressOf viewer_MouseMove End Sub Private Sub viewer_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 Rectangle = New Rectangle(100, 100, 100, 100)       If rc.Contains(e.X, e.Y) Then          _automation.Cancel()       End If    End If End Sub

C#

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public void AnnAutomation_Cancel()  {     // subclass to the viewer mouse move event     // _automation is an AnnAutomation object     _automation.Viewer.MouseMove += new MouseEventHandler(viewer_MouseMove);  }  private void viewer_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        Rectangle rc = new Rectangle(100, 100, 100, 100);        if(rc.Contains(e.X, e.Y))           _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 Server 2003 family, Windows Server 2008 family

Reference