GDI Support for Window Objects

GDI provides support for window creation and deletion, and for the enumeration of rectangles in a window.

Function	Description
EngCreateWnd	Create a WNDOBJ structure on a specified surface.
EngDeleteWnd	Deletes a WNDOBJ structure.
WNDOBJ_bEnum	Gets a collection of rectangles from the visible region of a window.
WNDOBJ_cEnumStart	Sets parameters for enumeration of rectangles in the visible region of a window.
WNDOBJ_vSetConsumer	Sets a driver-defined value in the pvConsumer member of the specified WNDOBJ structure.