My program crashes everytime I call flip or attempt to blt on the back surface. Here is my Init code, tell me what is wrong: DDSURFACEDESC2 ddsd; DDSCAPS2 ddscaps; DirectDrawCreateEx(NULL, (VOID**)&g_pDD, IID_IDirectDraw7, NULL); g_pDD->SetCooperativeLevel(hWnd, flags); g_pDD->SetDisplayMode(width, height, bpp, refresh, NULL); ZeroMemory(&ddsd, sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS / DDSD_BACKBUFFERCOUNT; ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE / DDSCAPS_FLIP / DDSCAPS_COMPLEX; ddsd.dwBackBufferCount = 1; g_pDD->CreateSurface(&ddsd, &g_pDDSPrimary, NULL); ZeroMemory(&ddscaps, sizeof(ddscaps)); ddscaps.dwCaps = DDSCAPS_BACKBUFFER; g_pDDSPrimary->GetAttachedSurface(&ddscaps, &g_pDDSBack); I can set the display mode and blt to the front surface, but I seem to be messing up when I initialize the back surface somehow. Thanks.

You''re dividing all the bit flags, you want to OR them.

Try switching the /''s to /''s.

They are ORed, it''s jsut this HTML crap messing up my cut an paste...

Hi

well you dont check for the return values of the function. check eqach DDraw function return value.. if all return DD_OK then it is very odd that it crashes.. if not, you must check which function is not returning DD_OK and then check the return value and see what the error is !!

hope it helps

bruno sousa aka akura

I agree with Akura. You should always check every functions return during the initialization. It isn''t time critical, so there is no excuse for such poor programming behavior.