GIF Length

Hi...
I need to calculate the length of data in a GIF-File (including header). Since the GIF is linked into another file. I do NOT need to display it, i simply need the effective length/size of the code (to find next data behind it) and X/Y/C as the case maybe.
thanx :)
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omsecAsked:
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gikamCommented:
Ok, what u need is the GIF file format, right?
Then go to http://www.dc.ee/Files/Programm.Graphics/
and u'll find a lot of file formats doc, including GIF, and some utilities.
good luck!
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gikamCommented:
In what file is linked the GIF file?
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omsecAuthor Commented:
It's linked using COPY /B FILE.DBX + FILE.GIF into a binary file.

I can calculate the Length of the DBX-Data and I can find the Start-Byte of the GIF. But I don't know where the last GIF-Byte is. So actually I can't link any other Data into the DBX after the GIF
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gikamCommented:
Thanks
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