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| Hardware and Windows Vista Hardware issues in relation to Windows Vista. (microsoft.public.windows.vista.hardware_devices) |
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LinkBack | Thread Tools | Display Modes |
September 24th 08, 07:57 AM
posted to microsoft.public.windows.vista.hardware_devices
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Find out active graphics device programmatically (registry key)
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 
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September 24th 08, 10:20 AM
posted to microsoft.public.windows.vista.hardware_devices
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Find out active graphics device programmatically (registry key)
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.
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Linear Mode
