I got this working before but for some reason I cant get it to work now. I want to paint the Primary surface all black. DDBLTFX ddbltfx; // Erase the primary surface ddbltfx.dwFillColor = RGB(0, 0, 0); g_pDDSPrimary->Blt( NULL, NULL, NULL, DDBLT_COLORFILL, &ddbltfx );

Are you zero''ing out the struct and setting dwSize?

I dont think I am zeroing out anything. What you see is what I have in my code.

Try

memset(&ddbltfx,0,sizeof(ddbltfx);
ddbltfx.dwSize = sizeof(ddbltfx);

You might also need to specify a colorfill in the ddbltfx.dwCaps field.

- Sleepwalker

You could also add the DDBLT_WAIT flag to your blt call. Could make a difference...

I think this error was caused because he did not clean the struct. B.t.w: ZeroMemory (&ddbltfx, sizeof (ddbltfx)); has the same effect...

No you cant do that RGB macro thing. dwFillColor wants a DWORD and RGB(0,0,0) returns a COLORREF structure. look in the ddutil.cpp file in the sdk and look for the function colormatch then change your code to

ddbltfx.dwFillColor = DDColorMatch(g_pDDSPrimary,RGB(0,0,0));