创建24/32bit BMP

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BOOL SaveBitmap(BYTE * pBuffer, long lBufferSize )
{
  HANDLE hf = CreateFile( L"tmp.bmp", GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, NULL, NULL ); //create a bmp file

  if( hf == INVALID_HANDLE_VALUE )
   return 0;

  // write head
  BITMAPFILEHEADER bfh;
  memset( &bfh, 0, sizeof( bfh ) );
  bfh.bfType = 'MB';
  bfh.bfSize = sizeof( bfh ) + lBufferSize + sizeof( BITMAPINFOHEADER );
  bfh.bfOffBits = sizeof( BITMAPINFOHEADER ) + sizeof( BITMAPFILEHEADER );
  DWORD dwWritten = 0;
  WriteFile( hf, &bfh, sizeof( bfh ), &dwWritten, NULL );

  // write format info
  BITMAPINFOHEADER bih; memset( &bih, 0, sizeof( bih ) );
  bih.biSize = sizeof( bih );
  bih.biWidth = lWidth;
  bih.biHeight = lHeight;
  bih.biPlanes = 1;
  bih.biBitCount = 24; //you can set 32 if data is 32bit
  WriteFile( hf, &bih, sizeof( bih ), &dwWritten, NULL );

  // write data
  WriteFile( hf, pBuffer, lBufferSize, &dwWritten, NULL );

  CloseHandle( hf );

return 0;
}