Retrieves the capabilities of the rendering device.
HRESULT GetDeviceCaps( D3DCAPS9 * pCaps );
If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be D3DERR_INVALIDCALL.
IDirect3DDevice9::GetDeviceCaps retrieves the software vertex pipeline capabilities when the device is being used in software vertex processing mode.
Header: Declared in D3d9.h.