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>>This is strictly a SWAG, but I'd look at sending a WM_PAINT message to the control via either SendMessage() or PostMessage(). My first thought would be to place it in the re-size event. The Treeview control has an hWnd property that would be used to identify the target window.
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>Use PostMessage, since the hWnd of the TreeView is different than the hWnd of the form, and it doesn't respond to the form's lockscreen property.
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Well, I was working off the top of my head.< bg >