A keystroke (or click) and the screen (or the window) is printed out or saved in a file.
Standard Hardcopy:
The key [Print] prints out the current screen.
The key [Alt+Print] prints out the current window.
A click onto the Hardcopy - symbol in the System Tray prints out the current screen.
In addition a printer icon is available in foreground window:
A click (with the left mouse button) onto this icon prints out the current window.
A click (with the Middle mouse button) onto this icon enables as example a partial window.
A click (with the right mouse button) onto this icon enables as example a copy to WinWord.