VC怎样把一副自己画的图存成BMP格式

int SaveBmp(HANDLE hData,LPSTR filename)

{

BITMAPFILEHEADER bfh;

BITMAPINFOHEADER *lpbi=(BITMAPINFOHEADER*)hData;

bfh.bfType=0x4D42; //BM

bfh.bfSize=sizeof(bfh)+GlobalSize(hData);

bfh.bfReserved1=bfh.bfReserved2=0;

int colors=1<biBitCount;

if(colors>256) colors=0;

bfh.bfOffBits=sizeof(bfh)+lpbi->biSize+colors*sizeof(RGBQUAD);

HANDLE hFile=CreateFile(filename,GENERIC_WRITE

,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,

FILE_ATTRIBUTE_NORMAL,NULL);

if(hFile)

{

DWORD write;

WriteFile(hFile,&bfh,sizeof(bfh),&write,NULL);

WriteFile(hFile,lpbi,GlobalSize(hData),&write,NULL);

int i=sizeof(hData);

CloseHandle(hFile);

return true;

}

return false;

}