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How to force redraw on PropertyGrid?

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Boyd View Drop Down
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    Posted: 08 June 2004 at 11:17am

For performance reasons, I want to prevent the PropertyGrid from redrawing while I clear categories and items.  The two methods I'm aware of in Visual Basic to do this are the 'LockWindowUpdate' function and the 'WM_SETREDRAW' message.

'WM_SETREDRAW' is the preferred method since 'LockWindowUpdate' only works on one control at a time.  When I execute the following command:

SendMessage PropertyGrid.hWnd, WM_SETREDRAW, 0, 0

The control stops redrawing (as expected).  When I execute the following command:

SendMessage PropertyGrid.hWnd, WM_SETREDRAW, 1, 0

The redraw is turned back on BUT only for future drawing.  It does not draw that last changes before redraw was turned back on.  Is there a way to force the PropertyGrid to redraw after I turn drawing back on?  I've tried the following:

RedrawWindow PropertyGrid.hWnd, ByVal 0&, ByVal 0&, RDW_INVALIDATE

But it the PropertyGrid still didn't redraw.  Any suggestions are greatly appreciated on how to control the Redraw of the PropertyGrid.  Thanks in advance!

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