PyCWnd.RedrawWindow
RedrawWindow(rect, object, flags)
Updates the specified rectangle or region in the given window's client area.
Parameters
rect=None : (left, top, right, bottom)
A rect, or None
object=PyCRgn or None : PyCRgn
A region
flags=RDW_INVALIDATE | RDW_UPDATENOW | RDW_ERASE : int
MFC References
CWnd::RedrawWindow