The IDirect3DExecuteBuffer::Validate method is not currently implemented.
HRESULT Validate(
LPDWORD lpdwOffset,
LPD3DVALIDATECALLBACK lpFunc,
LPVOID lpUserArg,
DWORD dwReserved
);
Windows NT: Use version 4.0 or later.
Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
Windows CE: Unsupported.
Header: Declared in ddraw.h.
Import Library: Use ddraw.lib.