how to tell if a file is zipped

is there anyway to programatically (VB6) determine if a file is compressed. I need something that will work for files with and without the *.zip extension.

Thanks for any help

muddy,

the ZIP file format is well known and available and yes, you can figure out by the presence of some internal tags whether a file is in fact a ZIP file (regardless of its extent)

Quote:

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Originally posted by phinds
muddy,

the ZIP file format is well known and available and yes, you can figure out by the presence of some internal tags whether a file is in fact a ZIP file (regardless of its extent)

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phinds,
Thanks, Ill continue searching around the web. If you know of a standard that I can use as search term, it would be appreciated.

Thanks again.