<BrowsableAttribute(False)>
Public Overridable Property MagnifyGlass As RasterMagnifyGlass

Visual Basic (Usage)	Copy Code
Dim instance As RasterImageViewer Dim value As RasterMagnifyGlass   instance.MagnifyGlass = value   value = instance.MagnifyGlass

[BrowsableAttribute(false)]
public virtual RasterMagnifyGlass MagnifyGlass {get; set;}

[BrowsableAttribute(false)]
public:
virtual property RasterMagnifyGlass^ MagnifyGlass {
   RasterMagnifyGlass^ get();
   void set (RasterMagnifyGlass^ value);
}

Return Value

This sample lets create your own custom magnify glass. The custom magnify glass is drawn with a red "X" for the crosshair The border is a blue rectangle.

Visual Basic

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Private Class MyRasterMagnifyGlass : Inherits RasterMagnifyGlass     Public Sub New()         Shape = RasterMagnifyGlassShape.Border3D     End Sub     Protected Overrides Sub OnPaintBorder(ByVal graphics As Graphics, ByVal centerPoint As Point)         Dim width As Integer = (Size.Width - 2) \ 2         Dim height As Integer = (Size.Height - 2) \ 2         Dim rc As Rectangle = New Rectangle(centerPoint.X - width, centerPoint.Y - height, 2 * width, 2 * height)         graphics.DrawRectangle(Pens.Blue, rc)     End Sub     Protected Overrides Sub OnPaintCrosshair(ByVal graphics As Graphics, ByVal centerPoint As Point)         Dim width As Integer = (Size.Width - 2) \ 2         Dim height As Integer = (Size.Height - 2) \ 2         Dim p1 As Point = New Point(centerPoint.X - width, centerPoint.Y - height)         Dim p2 As Point = New Point(centerPoint.X + width, centerPoint.Y + height)         graphics.DrawLine(Pens.Red, p1, p2)         p1 = New Point(centerPoint.X + width, centerPoint.Y - height)         p2 = New Point(centerPoint.X - width, centerPoint.Y + height)         graphics.DrawLine(Pens.Red, p1, p2)     End Sub End Class Private Sub viewer_MagnifyGlassChanged(ByVal sender As Object, ByVal e As EventArgs)     MessageBox.Show("Custom Magnify Glass being used -- red X for crosshair, blue for border") End Sub Public Sub RasterImageViewer_MagnifyGlass(ByVal viewer As RasterImageViewer)     AddHandler viewer.MagnifyGlassChanged, AddressOf viewer_MagnifyGlassChanged     viewer.MagnifyGlass = New MyRasterMagnifyGlass()     viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass     RemoveHandler viewer.MagnifyGlassChanged, AddressOf viewer_MagnifyGlassChanged End Sub

C#

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class MyRasterMagnifyGlass : RasterMagnifyGlass  {     public MyRasterMagnifyGlass()     {        Shape = RasterMagnifyGlassShape.Border3D;     }     protected override void OnPaintBorder(Graphics graphics, Point centerPoint)     {        int width = (Size.Width - 2) / 2;        int height = (Size.Height - 2) / 2;          Rectangle rc = new Rectangle(centerPoint.X - width, centerPoint.Y - height, 2*width, 2*height);        graphics.DrawRectangle(Pens.Blue, rc);     }       protected override void OnPaintCrosshair(Graphics graphics, Point centerPoint)     {        int width = (Size.Width - 2) / 2;        int height = (Size.Height - 2) / 2;        Point p1 = new Point(centerPoint.X - width, centerPoint.Y - height);        Point p2 = new Point(centerPoint.X + width, centerPoint.Y + height);        graphics.DrawLine(Pens.Red, p1, p2);          p1 = new Point(centerPoint.X + width, centerPoint.Y - height);        p2 = new Point(centerPoint.X - width, centerPoint.Y + height);        graphics.DrawLine(Pens.Red, p1, p2);     }  }    private void viewer_MagnifyGlassChanged(object sender, EventArgs e)  {     MessageBox.Show("Custom Magnify Glass being used -- red X for crosshair, blue for border");  }    public void RasterImageViewer_MagnifyGlass(RasterImageViewer viewer)  {     viewer.MagnifyGlassChanged+= new EventHandler(viewer_MagnifyGlassChanged);     viewer.MagnifyGlass = new MyRasterMagnifyGlass();     viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass;       viewer.MagnifyGlassChanged -= new EventHandler(viewer_MagnifyGlassChanged);  }

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