This example will draw a grid 100 pixels apart on the surface of the viewer before the container is drawn.

Visual Basic

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Public theContainer As AnnContainer Public Sub AnnContainer_BeforeDrawingObjects(ByVal container As AnnContainer)    ' theContainer is set so that it can be accessed in the container_BeforeDrawingObjects event    theContainer = container    AddHandler container.BeforeDrawingObjects, AddressOf container_BeforeDrawingObjects End Sub Private Sub container_BeforeDrawingObjects(ByVal sender As Object, ByVal e As AnnPaintEventArgs)    ' draw a grid, 100 pixels apart    Dim graphics As Graphics = e.Graphics    ' set the current transform from the container    graphics.MultiplyTransform(theContainer.Transform)    ' get the bounds in pixels    Dim rc As AnnRectangle = theContainer.Bounds.ConvertTo(theContainer.UnitConverter, AnnUnit.Pixel)    Dim p As Pen = New Pen(Color.FromArgb(128, 255, 255, 255))    Try       ' draw the grid       Dim x As Single = rc.Left       Do While x <= rc.Right          graphics.DrawLine(p, x, 0, x, rc.Bottom)          x += 100       Loop       Dim y As Single = rc.Top       Do While y <= rc.Bottom          graphics.DrawLine(p, 0, y, rc.Right, y)          y += 100       Loop    Finally       CType(p, IDisposable).Dispose()    End Try End Sub

C#

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public AnnContainer theContainer;  public void AnnContainer_BeforeDrawingObjects(AnnContainer container)  {     // theContainer is set so that it can be accessed in the container_BeforeDrawingObjects event     theContainer = container;     container.BeforeDrawingObjects += new EventHandler<AnnPaintEventArgs>(container_BeforeDrawingObjects);  }  private void container_BeforeDrawingObjects(object sender, AnnPaintEventArgs e)  {     // draw a grid, 100 pixels apart       Graphics graphics = e.Graphics;       // set the current transform from the container     graphics.MultiplyTransform(theContainer.Transform);       // get the bounds in pixels     AnnRectangle rc = theContainer.Bounds.ConvertTo(theContainer.UnitConverter, AnnUnit.Pixel);       using (Pen p = new Pen(Color.FromArgb(128, 255, 255, 255)))     {        // draw the grid        for (float x = rc.Left; x <= rc.Right; x += 100)           graphics.DrawLine(p, x, 0, x, rc.Bottom);          for (float y = rc.Top; y <= rc.Bottom; y += 100)           graphics.DrawLine(p, 0, y, rc.Right, y);     }  }

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference