How to take the Image of Only Active Window using Print Screen?

When you use the print screen command in Windows, it takes the image of the whole screen.

If you want to display only a particular portion of that image, you have to use an image editing tool (like MS Paint) to crop.

In case you wanted to take the image of only the active window, you can just use Alt + Print Screen (prt Scr) to take the image of the active windows alone.