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answers:

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Similar to the ButtonRenderer class, I want to be able to paint the +/- buttons used in TreeViewNodes completely separately to any instance of a TreeView. There doesn't seem to be a ControlPaint method that does it, and drawing a Button doesn't look right. Where can I get the drawing code for a treeview node from?

+1  A: 

You can draw most parts of the standard Windows controls using the Windows visual styles API.

I haven't tried rendering a tree view control, but take a look at the .NET VisualStyleRenderer class, which appears to wrap all of the functionality of the unmanaged API.

Tim Robinson
The link to the TreeView glyphs: http://msdn.microsoft.com/en-us/library/system.windows.forms.visualstyles.visualstyleelement.treeview.glyph(v=VS.90).aspx
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