public static extern bool RedrawWindow(IntPtr hwnd, COMRECT rcUpdate, IntPtr hrgnUpdate, int flags);
public static extern bool RedrawWindow(IntPtr hwnd, COMRECT rcUpdate, IntPtr hrgnUpdate, int flags);
public static extern bool RedrawWindow(IntPtr hwnd, COMRECT rcUpdate, IntPtr hrgnUpdate, int flags);
public static extern bool RedrawWindow(IntPtr hwnd, COMRECT rcUpdate, IntPtr hrgnUpdate, int flags);