RECT Window_rectangle = {0}; WinQueryWindowRect (Window, &Window_rectangle);         

INT Margin = 5;
Window_rectangle.xLeft += Margin; Window_rectangle.xRight -= (Margin + 1);
Window_rectangle.yBottom += Margin; Window_rectangle.yTop -= (Margin + 1);

GpiSetGraphicsField (Presentation_space, &Window_rectangle);
