Hi, I have a little problem. I init DD using the following code: ddrval = DirectDrawCreate(NULL, &lpDD, NULL); if(ddrval!=DD_OK) goto error; ddrval = lpDD->SetCooperativeLevel (Handle,DDSCL_EXCLUSIVE I DDSCL_FULLSCREEN); if(ddrval!=DD_OK) goto error; ddrval = lpDD->SetDisplayMode(800,600,16); if(ddrval!=DD_OK) goto error; ZeroMemory(&ddsd,sizeof(ddsd)); ddsd.dwSize=sizeof(ddsd); ddsd.dwFlags=DDSD_CAPS I DDSD_BACKBUFFERCOUNT; ddsd.ddsCaps.dwCaps=DDSCAPS_PRIMARYSURFACE I DDSCAPS_FLIP I DDSCAPS_COMPLEX; ddsd.dwBackBufferCount=1; ddrval=lpDD->CreateSurface(&ddsd, &lpDDSPrimary, NULL); if(ddrval!=DD_OK) goto error; ddscaps.dwCaps=DDSCAPS_BACKBUFFER; ddrval=lpDDSPrimary->GetAttachedSurface(&ddscaps,&lpDDSBack); if(ddrval!=DD_OK) goto error; OK, it works. I'd like to blt the same picture to the backbuffer and to the primary surface (so the user cannot notice the flip.) ddrval=FDDBlt(lpDDSBack,0,0,lpDDSBG,0,0,800,600,DDBLTFAST_NOCOLORKEY);//my blt, destination, source,options if(ddrval!=DD_OK) goto error; ddrval=FDDFlip(); //it's my own flip, handling lost surfaces, etc. if(ddrval!=DD_OK) goto error; ddrval=FDDBlt(lpDDSBack,0,0,lpDDSBG,0,0,800,600,DDBLTFAST_NOCOLORKEY); if(ddrval!=DD_OK) goto error; Then I use a timer (in BCB 3) to switch between the surfaces, but the screen flickers ! (One of the surfaces is empty.) Then I tried to wait for a second after the DD init. And the flickering disappeared ! Why ???????????????????? Do I have to wait between the initialization and the first blt ???? thx, ferceg Edited by - ferceg on 1/30/00 3:25:51 PM

Well the first thing I noticed that you are using slashes (/) instead of pipes (/) to OR flags together.

Scratch that... seems the board can''t handle pipe characters

///////////////////////////// yup.... sorry...

Yes, pipe characters are not welcome here...
I changed them to I-s...