Take great care when using this method. The returned presentation space is not clipped to any of the other windows present on the screen. Thus it is possible to draw in regions belonging to windows of other threads and processes.

The WinLockWindowUpdate function should be used to avoid simultaneous updates to the same part of the screen. This does not cause the presentation space returned by this function to become clipped in any way. Care of the appearance of windows of other threads is still the responsibility of the user of the screen presentation space.

When the application finishes using the screen presentation space, it should be destroyed using the WinReleasePS call.