Any current Presentation Manager applications are set to the background. While this condition exists, the presentation driver must make all calls as usual. However, it might not affect the underlying hardware, that is, the presentation driver must continue to accumulate bounds and respond to queries but it might not actually draw to the display. When GreResurrection is called, the missing output will be re-created by the system sending a WM_PAINT message to the application.

This function goes directly to the Presentation Manager interface.