2JohnCz: The feature is that,"he"(windows) treat tab control&status window
as part of client area,and refresh it,when i call WM_PAINT -->draw backgroun upon controls for a second). I think so.If i comment WM_PAINT all is ok.
So,want to know,how to refresh not all client area,for example.
(code is large)

Message is standart WM_PAINT: hdc=BeginPaint(..)
Plot();
EndPaint();