Display Independant BitmapInfo ( DIB )
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 DESCRIPTION:

  The BITMAPINFO structure fully defines the dimensions and color info
  for a Windows device-independent bitmap (DIB). 


   Member  Description

     bmiHeader  Specifies a BITMAPINFOHEADER structure that contains
                information about the dimensions and color format of a DIB 
     bmiColors  Specifies an (c)array of RGBQUAD structures that define the
                colors in the bitmap. 


  A Windows 3.0 or later DIB consists of two distinct parts: a BITMAPINFO
  structure, which describes the dimensions and colors of the bitmap, and
  an array of bytes defining the pixels of the bitmap. The bits in the
  array are packed together, but each scan line must be zero-padded to end
  on a LONG boundary. Segment boundaries, however, can appear anywhere in
  the bitmap. The origin of the bitmap is the lower-left corner. 

  The biBitCount member of the BITMAPINFOHEADER structure determines the
  number of bits which define each pixel and the maximum number of colors
  in the bitmap. This member may be set to any of the following values: 

     Value      Meaning

       1    The bitmap is monochrome, and the bmciColors member must
            contain two entries. Each bit in the bitmap array represents a
            pixel. If the bit is clear, the pixel is displayed with the
            color of the first entry in the bmciColors table. If the bit is
            set, the pixel has the color of the second entry in the table. 

       4    The bitmap has a maximum of 16 colors, and the bmciColors 
            member contains 16 entries. Each pixel in the bitmap is
            represented by a four-bit index into the color table. For
            example, if the first byte in the bitmap is 0x1F, the byte
            represents two pixels. The first pixel contains the color in
            the second table entry, and the second pixel contains the color
            in the sixteenth table entry. 

       8    The bitmap has a maximum of 256 colors, and the bmciColors
            member contains 256 entries. In this case, each byte in the
            array represents a single pixel. 

      24    The bitmap has a maximum of 224 colors. The bmciColors member
            is zero, and each 3-byte sequence in the bitmap array represents
            the relative intensities of red, green and blue, respectively,
            of a pixel. 

  The biClrUsed member of the BITMAPINFOHEADER structure specifies the
  number of color indexes in the color table actually used by the bitmap.
  If the biClrUsed member is set to zero, the bitmap uses the maximum 
  number of colors corresponding to the value of the biBitCount member. 

  The colors in the bmiColors table should appear in order of importance. 
  Alternatively, for functions that use DIBs, the bmiColors member can be
  an array of 16-bit unsigned integers that specify an index into the
  currently realized logical palette instead of explicit RGB values.
  In this case, an application using the bitmap must call DIB functions
  with the wUsage parameter set to DIB_PAL_COLORS. 

  Note: The bmiColors member should not contain palette indexes if the
  bitmap is to be stored in a file or transferred to another application.
  Unless the application uses the bitmap exclusively and under its
  complete control, the bitmap color table should contain explicit RGB
  values.