How do I use print screens in a thread?

How do I use print screens in a thread? I have all the evidence to prove that I have been scammed, but I don't know how to send my print screens in a thread. Can someone help me please?

 

Well, you can screenshot it, run it through Paint, then upload it to TinyPic or something. Though that might be a bit complicated if you've never done this before.

I recommend puush, it does the work for you, and all you have to do is just copy and paste the link. All you have to do is just drag a box over where you want to screenshot and just let go. It will save it and upload it, and then send you the link. It's really good and useful when you get the hang of it.

http://puush.me/

 

Mu user friendly Imgur guide: http://sythe.org/showthread.php?t=1337762

 

Imgur has free image uploading without having to sign up or do a captcha like Tinypic or Imageshack.
Though if you use Imageshack there is an album saved for easy access.
As said above by Laptop, puush has an auto-uploader, but I have no idea how to use it as it's glitched on my desktop.
If you find the same problems you can try any of the ones I said above.
http://tinypic.com/
http://imgur.com/
http://imageshack.us/