A function to send a hotkey Ctrl+Shift+K , sends the down keys, but once the application (listary) launches, autoit stops executing any further commands/lines in the function. This includes sending simple letter keys OR sending the UP keys.    afaik this is not a send() problem about CTRL_UP not being send , as said in the faq. This seems to be a different problem. Sleep(10)  doesn't help either. Func listary()     Send ("{CTRLDOWN}")     Send ("{SHIFTDOWN}")     Sleep(10)