screen capture application in win 7

I want to get a screen capture application that can auto make screen capture when the screen have changed ,for example the mouse cursor move over or the object in screen changed .
I know there is one (in win 7 ) before but I forget the name .......

Please advise

This is my go to site for when I'm looking for an App/program, next to Sourceforge and for code, Github. http://www.snapfiles.com/downloadfind.php?st=screen+capture&action=s&ref=2&search=Find+it&lc=1

I have the "only freeware" checked. So if you are willing to buy something uncheck that. Good luck!