From NirSoft Freeware
NirCmd is a small command-line utility that allows you to do some useful tasks without displaying any user interface. By running NirCmd with simple command-line option, you can write and delete values and keys in the Registry, write values into INI file, dial to your internet account or connect to a VPN network, restart windows or shut down the computer, create shortcut to a file, change the created/modified date of a file, change your display settings, turn off your monitor, open the door of your CD-ROM drive, and more...
# On savescreenshot, savescreenshotfull, and savescreenshotwin commands, you can now specify *clipboard* as a filename, in order to save the screenshow into the clipboard
# On savescreenshot command, you can now specify a rectangle to capture as x, y, width, and height instead of capturing the entire screen.