INT 16 - PC Tools v5.1+ DESKTOP API - GET KEY
AX = FFECh
DS:SI -> FAR routine to ???
BX = ???
???
Return: AX = keystroke
FFFFh if F10 pressed to go to menu
Notes:  available only when popped up
invokes INT 28 while waiting for keystroke
F10 is hotkey to Desktop menu


16FFEC - PC Tools v5.1+ DESKTOP API - GET KEY