DDSURFACEDESC ddsd;LPDIRECTDRAWSURFACE lpDDPrimary;LPDIRECTDRAWSURFACE lpDDBackbuffer;DDSCAPS ddscaps;// set the whole thing to zeroZeroMemory( &ddsd, sizeof( DDSURFACEDESC ) );// obligatory: DD has to know the struct's sizeddsd.dwSize = sizeof( DDSURFACEDESC );// set the flags: Caps and BackbufferCount contain infoddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;// now fill the capsddsd.ddsdCaps.dwCaps = DDSCAPS_PRIMARYSURFACE |  // primary surface                       DDSCAPS_FLIP |            // flippable                       DDSCAPS_COMPLEX |         // surface is complex                       DDSCAPS_VIDEOMEMORY;      // surface is in video memory// set Backbuffer Count: double buffering, so one backbufferddsd.dwBackBufferCount = 1;// create primary bufferHRESULT hr = lpDD->CreateSurface( &ddsd, &lpDSPrimary, NULL );// error checking goes here// zero the cute lil' thingZeroMemory( &ddscaps, sizeof( ddscaps ) );// set the appropriate caps fieldddscaps.dwCaps = DDSCAPS_BACKBUFFER;// now get the attached backbufferhr = lpDDPrimary->GetAttachedSurface( &ddscaps, &lpDDBackbuffer );// error checking goes here