Download Attachment From Gmail

I did a quick search and found some rather interesting topics, I want to e-mail a file to myself and automatically download the attachment, make some changes and re-mail it back to me.

For e-mailing the file I am using this

The part that I'm stuck on is downloading the e-mail attachment.

Topics I found:

http://www.autoitscript.com/forum/topic/127296-download-attachment-from-gmail/

http://www.autoitscript.com/forum/topic/141340-remote-gmail-udf/