Get the view transform that applies to all sprites.
HRESULT GetViewTransform( [out] D3DXMATRIX *pViewTransform );
Pointer to a D3DX10MATRIX that will be set to the transform of the sprite from the original world space.
If the method succeeds, the return value is S_OK. If the method fails, the following value will be returned: D3DERR_INVALIDCALL.