How to force redraw on PropertyGrid?

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   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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Boyd Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 08 December 2003 Location: United States Status: Offline Points: 285	Post Options Post Reply Quote Boyd Report Post Thanks(0) Quote Reply Topic: How to force redraw on PropertyGrid? 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!