GETWINDOWS - Retrieve the current graphics window.
IDLgrWindow - An on-screen area on a display device.
WDELETE Procedure - Delete Direct Graphics windows.
WIDGET_WINDOW - Create a graphics widget.
WINDOW - Create an empty graphics window.
WINDOW Procedure - Create a Direct Graphics window.
WSET - Select the current Direct Graphics window.
WSHOW - Expose or hide a Direct Graphics window.