The BITMAPFILEHEADER structure contains information about the type, size, and layout of a file that contains a DIB.

typedef struct tagBITMAPFILEHEADER {
  WORD  bfType;
  DWORD bfSize;
  WORD  bfReserved1;
  WORD  bfReserved2;
  DWORD bfOffBits;
} BITMAPFILEHEADER, *PBITMAPFILEHEADER;

Members

bfType
The file type; must be BM.

bfSize
The size, in bytes, of the bitmap file.

bfReserved1
Reserved; must be zero.

bfReserved2
Reserved; must be zero.

bfOffBits
The offset, in bytes, from the beginning of the BITMAPFILEHEADER structure to the bitmap bits.

Remarks

A BITMAPINFO or BITMAPCOREINFO structure immediately follows the BITMAPFILEHEADER structure in the DIB file. For more information, see Bitmap Storage.

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 bfOffBits = sizeof (BITMAPFILEHEADER) +sizeof（BITMAPINFOHEADER） + NumberOfRGBQUAD * sizeof(RGBQUAD)