Override the method
Form.OnPaint. In this method, use the instance of
System.Drawing.Graphics passed to you via the event argument parameters, and paint on the form using its method
System.Drawing.Graphics.FillRectangle. For a brush, use a gradient brush
System.Drawing.Drawing2D.LinearGradientBrush.
Please see:
http://msdn.microsoft.com/en-us/library/yysstebh.aspx[
^],
http://msdn.microsoft.com/en-us/library/system.drawing.drawing2d.lineargradientbrush.aspx[
^].
Don't forget to dispose the objects which implement
System.IDisposable. The best way of doing it and guarantee that it happens even if an exception is thrown, is using the
using statement, which acts identically to the try-finally block:
http://msdn.microsoft.com/en-us/library/system.idisposable.aspx[
^],
http://msdn.microsoft.com/en-us/library/yh598w02%28v=vs.100%29.aspx[
^].
You may face some flicker. You can eliminate it using double buffering for the form (or other control) where you do your custom rendering:
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.doublebuffered.aspx[
^].
Best wishes and wake-ups… :-)
—SA
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