GetAvailableVidMem with DirectX 10

Hi

The problem details are:

Setup:
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I have a Windows Vista(RC1) machine with Intel Graphics card.
The DirectX version 10.

Problem:
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When I run my application which uses the API GetAvailableVidMem the application
gives an error "A hardware only DirectDraw object creation was attempted but the
driver did not support any hardware."

Analysis:
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When I run dxdiag.exe on my machine,in the Display Tab it shows me DirectDraw Accleleration
and AGP Texture Acceleration-Not Avialble.I think the problem is because of this(I think so
because when a disabled DirectDraw Accleleration on another machine with Windows Xp and
DirectX 9.0C it gave me the same error)

Help Required:
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Am I thinking in the right direction
How do I overcome this problem