Hello all. I am trying to control graphics hardware acceleration programmatically. My question is: How can I find the GUID of the active display device? What I already found out: The registry key for controlling this hardware acceleration is HKLM\SYSTEM\CurrentControlSet\Control\Video\[GUID of graphics card]\0000\Acceleration.Level I thought that another registry key can be used to find out about the graphics adapter GUID: HKLM\Hardware\Devicemap\Video\ and there \Device\Video0 However on another computer it is not Video0 but Video7 and Video8 Is there any (official) documentation on this matter? Thank you in advance Ulrich
Ok finally answered this one myself: ::EnumDisplayDevices(...) is your friend. It delivers you DISPLAY_DEVICE.DeviceKey which is exactly the registry key I am looking for. I take it that the flag DISPLAY_DEVICE_PRIMARY_DEVICE in DISPLAY_DEVICE.StateFlags signifies the device I am looking for.
