//NEWBITMAPSURFACE()////This function loads a bitmap from file and stores it on an offscreen surface,//which it returns.  It also attaches a color key for you!LPDIRECTDRAWSURFACE NewBitmapSurface(LPDIRECTDRAW,HINSTANCE,char *);LPDIRECTDRAWSURFACE NewBitmapSurface(LPDIRECTDRAW lpdd,HINSTANCE hinstance,char * filename){	HBITMAP hbm;	BITMAP bm;	HDC hdc;	//Load the bitmap of the passed file name into the bitmap handle	hbm = (HBITMAP)LoadImage(hinstance,filename,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);	if(!hbm) return NULL;	//Copy the bitmap''s infor into the bitmap buffer bm	GetObject(hbm,sizeof(BITMAP),&bm);	if(bm.bmBitsPixel != 8) return NULL;	//Set up the surface - use the height and width of the loaded bitmap	LPDIRECTDRAWSURFACE lpdds;	DDSURFACEDESC ddsd;	ZeroMemory(&ddsd,sizeof(DDSURFACEDESC));	ddsd.dwSize = sizeof(DDSURFACEDESC);	ddsd.dwFlags = DDSD_CAPS|DDSD_HEIGHT|DDSD_WIDTH;	ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;	ddsd.dwHeight = bm.bmHeight;	ddsd.dwWidth = bm.bmWidth;  ///////////////////////////////////////////////////////////Should I add a line setting ddsd.lPitch = bm.bmWidth?///////////////////////////////////////////////////////////	if(lpdd->CreateSurface(&ddsd,&lpdds,NULL)!=DD_OK) return NULL;	//Assign a DC to the surface	lpdds->GetDC(&hdc);	//Create a DC compatible with hdc	HDC hdcbm = CreateCompatibleDC(hdc);	//Select the bitmap object into the DC hdcbm	SelectObject(hdcbm,hbm);	//Blit from the DC holding the bitmap to the surface DC	BitBlt(hdc,0,0,bm.bmWidth,bm.bmHeight,hdcbm,0,0,SRCCOPY);	//Clean-up	lpdds->ReleaseDC(hdc);	DeleteDC(hdc);	DeleteDC(hdcbm);	DeleteObject(hbm);	//Set a color key	DDCOLORKEY ddcolkey;	ZeroMemory(&ddcolkey,sizeof(DDCOLORKEY));	ddcolkey.dwColorSpaceHighValue = 0;	ddcolkey.dwColorSpaceLowValue = 0;	lpdds->SetColorKey(DDCKEY_SRCBLT,&ddcolkey);	//return success	return lpdds;}