Noob question about this site

Hey guys, I'm new to this site and I was just browsing around. When I went to the "Sell" section of the forums, I found some posts that had pictures about the stats of the weapons they were trying to sell (the gray boxes you get when moving your cursor over said item). I was just wondering how they do that, because I have some pretty good items that i would love to sell using this method. If you guys could help me out, that would be great.

Put your mouse over your weapon, press "Prt Scr" button. Open paint, holt ctrl and press V. Select the cropping tool, make a box around the items stats, hold CTRL press V. Go to EDIT dropdown menu and go to Select All, click it, press Delete button. press CTRL+V. ta da.

Ok, thanks a lot.

By the way, once you save it (save as PNG) upload it here. http://picsplace.to/

It'll give you a link to the picture. It works 10x better than the sites upload.