In Excel 2000:
What is an ".xlw" file?
What is an ".xlk" file?

I don't mean to be rude, but this can be easily found with some search engine doesn't it?

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You're not being rude (at least not to me). Don't know why I didn't google for those extensions


As far as I can tell, an XLK file is created by Excel 2000 and is some kind of a backup file. I got that from the FileXt.com website. I only have one XLK file in my system, but around 100 or so Excel 2000 files, so I'm not sure I really understand XLK files.

Maybe if I used Styles in my Excel files I would have more XLK files...

OTOH I have zero XLW files. FileX says they are for Excel 4.