I have a laptop but I don't have the prtscreen button thing. I wanted to do this to do this to avoid scammers/cheaters and posing ratio proof.

Note

Some keyboards or mobile PCs that don't have the PRINT SCREEN button might use other keyboard combinations, such as FN+INSERT, to take a screen capture. Check the information that came with your computer or the manufacturer's website for more information.

Check this thread

CLICK HERE

You can also use GIMP, here is a YouTube video on how to do it:

There is a program called SharpKeys (top result on Google), it allows you to map specific keyboard functions to any key combination. So you can map the Print Screen button to a button or series of buttons that actually exists on your keyboards.

Lightshot - LightShot ? screenshot tool for Mac & Win

Very good to take prints and you can use it from the windows bar.

ah u can always use your on screen keyboard found in accessories to have access to the print screen button or Screen Capture and Print Screen software works too. it lets u assign hot keys.

snag it is the best. cant go wrong with snag it

Use the Snipping Tool integrated with windows.In the start bar, on the "Search for programs and Files" box, type "Snipping Tool".

Fraps works fine.