Auto Filter by InputBox - filter by user defined column

I've had a look around the forum tonight and came across a Sort by input Column macro that I though I could use so after playing around with it to suit my needs I did manage to get it to do what I wanted.

Here's my code with the new bit added in & it works great.

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As you can see, I've left the new code much as I found it.....That's because I didn't know what to change the "Sort" on the end to ???????
What should I change this to or as it's working as it is could I just leave it as is?

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Here's where I found the piece of code I used
http://www.excelforum.com/excel-prog...ting-data.html

Thanks JBeaucaire, I'll give you credeit for helping me solve this one indirectly.

I have tested this macro on most of the date columns and it does seem to be working without any bugs but if anyone wants to have a look at it & verify it for me I'd appreciate it.

I've also attached the updated workbook on this post as well so this is the one to look at.

Thanks
John