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Posted 11 Jul 2002

VB.NET Knob Control using Windows Forms and GDI+

, 11 Jul 2002
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User Drawn Control for .NET Winforms using GDI+

Knob Control Image

This code was originally written by Jigar Desai using C#. Naturally, as a VB Programmer, I needed to see if this control could be readily implemented using VB.NET. After many hours of hair pulling, this control has been successfully ported to VB.NET . Additionally, I added a new design-time property to the original control which allows the Knob Color to take on a different color than the control's background. The only change to the original code is the addition of the "KnobColor" Property. I have included the "TestKnobControl" Project to demonstate the use of this control's ValueChanged Event as well as the vast array of different colors now available for the control.

This control implements several interesting techniques, to include: Delegates, Properties, GDI+ and Overriding base methods. Special thanks, from the VB Community, to Jigar for his quick and positive response on my request to post this control in VB.NET.

The original Article for this control can be found on


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

Web Developer
United States United States
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Comments and Discussions

GeneralUpdate for some Value visualization.. Pin
woo_hoo15-Nov-05 20:31
memberwoo_hoo15-Nov-05 20:31 

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