How to do a Screen Cap?

I joined in a blog contest and got an email from the sponsor. One requirement of the contest is for me to provide a screen cap of my entry. (sigh) This mom over here has been blogging since January of this year and though it is a bit embarrassing to admit I honestly don't know a thing about screen caps. Does anybody have this kind of experience? Oh well.

Thank God to the helpful hand of the internet. I searched for the answer to my question: "How to do a Screen Cap?" Here's what I got:

I did exactly as what is said in the instruction. Hold down Ctrl and push the "print screen" button, then open up paint and right click and push paste.

Thanks to Chacha  http://www.chacha.com/question/how-do-i-screen-cap.