[in] Pointer to an IDirect3DMobileSurface interface that will receive a copy of the contents of the front buffer. The data is returned in successive rows with no intervening space, starting from the vertically highest row on the device's output to the lowest.
The buffer pointed to by pDestSurface will be filled with a representation of the front buffer. The destination buffer should be the same size and format as the front buffer. An application can determine the size and format of the front buffer by calling IDirect3DMobileDevice::GetDisplayMode.