Class RectangularSelectionToolExample
    Public Sub SetRectangularSelectionToolAsActiveVisualToolOfImageViewer(viewer As Vintasoft.Imaging.UI.ImageViewer)
        ' create an instance of the RectangularSelectionTool class
        Dim rectangularSelectionTool1 As New Vintasoft.Imaging.UI.VisualTools.RectangularSelectionTool()
        ' set the tool as the current tool of the ImageViewer
        viewer.VisualTool = rectangularSelectionTool1
    End Sub
End Class

class RectangularSelectionToolExample
{
    public void SetRectangularSelectionToolAsActiveVisualToolOfImageViewer(
        Vintasoft.Imaging.UI.ImageViewer viewer)
    {
        // create an instance of the RectangularSelectionTool class
        Vintasoft.Imaging.UI.VisualTools.RectangularSelectionTool rectangularSelectionTool1 = 
            new Vintasoft.Imaging.UI.VisualTools.RectangularSelectionTool();
        // set the tool as the current tool of the ImageViewer
        viewer.VisualTool = rectangularSelectionTool1;
    }
}