Make sure to be in an Art Program! Use Paint if you are on Windows.
User Image - Blocked by "Display Image" Settings. Click to show.

User Image


Neat Trick: If you are in Windows XP/2000/ME you can press ALT + PrntScrn and it will take a screenshot of your most active window.
So if you want to only screenshot a single window, you can use that.

A Rule
Please do not Quote this Post