DX Bitmap loading problem

I''m working on a DirectX Tetris clone, and the program is crashing each time it reaches the following code: ------------------------------- ------------------------------- if(game_state == GAME_STATE_RUN) { DDSURFACEDESC2 ddsd; // directdraw surface description // initialize... waaaait... we did this already DDRAW_INIT_STRUCT(ddsd); (!(lpddsprimary->Lock(NULL,&ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT,NULL))) { // error return(0); } // end if // now ddsd.lPitch is valid and so is ddsd.lpSurface // make a couple aliases to make code cleaner, so we don''t // have to cast int mempitch = (int)ddsd.lPitch; UCHAR *video_buffer = (UCHAR *)ddsd.lpSurface; // Clear the surface HDC xdc = GetDC(hwnd); HBRUSH brush = (HBRUSH)CreateSolidBrush(RGB(0,0,0)); SelectObject(xdc, brush); Rectangle(xdc,0,0,640,480); ReleaseDC(hwnd, xdc); // now unlock the primary surface if (FAILED(lpddsprimary->Unlock(NULL))) return(0); // Create a bitmap surface LPDIRECTDRAWSURFACE4 lpddsBitmap = NULL; if(FAILED(lpddsBitmap->Lock(NULL, &ddsd, DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR, NULL))) { MessageBox(hwnd, "ERROR!", "ERROR!", MB_OK); } if ( ( lpddsBitmap = DDLoadBitmap( lpdd4, "Block1.bmp", 0, 0) ) == NULL ) return FALSE; int BITMAP_WIDTH = 32; int BITMAP_HEIGHT = 32; RECT rcFrom; rcFrom.left = 0; rcFrom.top = 0; rcFrom.right = BITMAP_WIDTH; rcFrom.bottom = BITMAP_HEIGHT; if ( FAILED( lpddsprimary->BltFast( 0, 0, lpddsBitmap, &rcFrom, DDBLTFAST_WAIT ) ) ) return FALSE; lpDDSBitmap->Unlock(NULL); // sleep a bit Sleep(30); // return success or failure or your own return code here return(1); } // End GAME_STATE_MAIN ------------------------------- ------------------------------- I have ddutil.cpp/.h included, and there are no problems with any other areas of the code. I believe the problem occurs when locking the primary and bitmap surfaces. Any help would be appreciated. - Steven Richards - AKA HTML_Dude