Assalamua'laikum and salam sejahtera,
Well, I think your brain already caught my idea right? Yes, you are a genius! hahaha...How super-outdated am I, didn't even know this sort of thing until now...The truth is, I already know about this THING, it is just that I don't know what's the name of this thing.(don't even know!?hahaha...) That is why I don't Google Search it over the web, because I don't know how to start! How lame person am I! Before this, I thought there would some sort of software to do that THING. When I learn the truth, it is just as simple as A,B,C...If I don't know, how come I came to know? Here...http://afifshafie.blogspot.com/2011/03/screen-capture-on-mac-os.html. I think I am going to age 100-200 years backward for not knowing this THING...hahaha...
Mohammad Sallihin Raman, welcome to 18th century!!!
p/s : after google search, it is said that there is some sort of software to do this THING for the non-XP, Vista and 7 users...me myself not really sure because I never see such software with my own cranial nerve II (windows only)