This page and its links should help. Warning long URL may get split.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps
_4v1h.asp

Paul

> Can anybody explain to me what all the codes in a .BMP file are for? So
> far I have figured out which bytes represents the picture code and how,
> and I have also figured out that some of the code gives you the size of
> the picture. But there are a whole bunch of other bytes at the start of
> the file that that makes no sense to me.

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