Screen Capture Is Blurry

[Giannis]

I'm putting together a tech book on a particular music software and general music production technique. When I'm trying to capture on screen graphics by hitting 'Print Screen' and then pasting and saving in Paint I get blurry pictures. They're not at all up with all the illustrations I see in books that cover software.

Is there a particular program which can do it better than the Windows Print Screen feature or am I missing something?