Batch command for if filename contains "X"?

I'm trying to run a batch file through a folder and delete files if their name contains a certain stri开发者_如何学编程ng. I'm not sure how to check the filename against the string though.

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why not just

del *X*

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This is what you need: http://www.robvanderwoude.com/findstr.php

This is an awesome website for scripts. Loads of other stuff that might be useful if you're into scripting.