While "sendkey ctrl-alt-delete" works, "sendkey CTRL-ALT-DELETE" does not. The uppercase version should work, as that's the format pasted from most documentation. BTW, "sendkey" gives an example of "ctrl-alt-del" which doesn't work. How about abbreviations like "del" for "delete"? And furthermore it would be nice to allow sendkey "send an example string\n" Thank you.