Window body and when accusing a heavy draw, refresh problem

Window body and accuse have heavy draw code, when if where,accusing a refresh, refresh accuses an itself, and not the window aspect that refresh controls a seat already on window body other accuse, thank!

Now my when accusing a refresh, whole window body also refresh, especially the mouse is put accuse on, refresh is particularly fierce, bring about window body to twinkleYourControl.InvalidateYourControl.Invalidate();
YourControl.Update();
Called YourControl.Invalidate(YourControl.Bound) to just twinkle in OnMouseMove incident namely, if do not call this, window body not refresh, but accuse an itself also not refreshThank everybody, the problem was solvedHow solve, can you say?