Win32: How to determine if DirectDraw is enabled?

Question

When using CachedBitmaps in GDIPlus, there is graphical corruption if Windows video "Hardware Acceleration" is lowered too much - such that DirectDraw is disabled:

There are six levels of hardware acceleration:

• Disable all accelerations
• Disable all but basic accelerations. (Default on server machines)
• Disable all DirectDraw and Direct3D accelerations, as well as all cursor and advanced accelerations
• Disable all cursor and advanced drawing accelerations
• Disable cursor and bitmap accelerations
• All accelerations are enabled (Default on desktop machines)

If DirectDraw is disabled, then using DrawCachedBitmap in GDI+ will result in graphical corruption. It's easy enough for me to use the slower DrawImage() API if DirectDraw is not enabled - but i have to be able to detect that DirectDraw is disabled.

How can i programatically check if DirectDraw is enabled?

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The question is: How does dxdiag do this:

See also

KB191660 - DirectDraw or Direct3D option is unavailable (archive)

Answer 1

If you download the latest DirectX SDK (I'm sure older sdk's have similar examples) there is an example of querying DXDIAG info.

The example is located at (SDK Root)\Samples\C++\Misc\DxDiagReport

In dxdiaginfo.cpp methods of note

CDxDiagInfo::CDxDiagInfo
CDxDiagInfo::Init
CDxDiagInfo::QueryDxDiagViaDll    
CDxDiagInfo::GetDisplayInfo

If you run the program it ouputs a giant list of values. I think the value you're interested in is pDisplayInfo->m_szDDStatusEnglish