if (FAILED(DirectDrawCreateEx(0,(void**)&lpDD,IID_IDirectDraw7,0)))
		return 0;
	lpDD->SetCooperativeLevel(hWnd,DDSCL_FULLSCREEN | DDSCL_ALLOWREBOOT | DDSCL_EXCLUSIVE);
	DDSURFACEDESC2 ddsd;
	ZeroMemory(&ddsd,sizeof(ddsd));
	ddsd.dwSize = sizeof(ddsd);
	ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
	ddsd.dwBackBufferCount = 1;
	ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_COMPLEX | DDSCAPS_FLIP;
	if (FAILED(lpDD->CreateSurface(&ddsd,&lpDDSPrimary,0)))
	{
		lpDD->Release();
		lpDD = 0;
		return 0;
	}
	DDSCAPS2 ddscaps;
	ddscaps.dwCaps = DDSCAPS_BACKBUFFER | DDSCAPS_FLIP;
	HRESULT r = lpDDSPrimary->GetAttachedSurface(&ddscaps,&lpDDSBack);