window width

[Tedd]

EDIT: hmmm - never tried to see what happens when you InvalidateRect when minimized
i wonder if the update region is null ?   :redface:

Either the invalidated rectangle will be added to the update region, or it won't.
But it makes no actual difference -- the entire window has to be updated once the window is restored, completely replacing any previous update region; and you won't receive WM_PAINT to redraw it until it's restored.