Category: DESQview/TopView and Quarterdeck programs

INT 15 - TopView - SEND MESSAGE - "SETESC" - SET ESCAPE ROUTINE ADDRESS

	AH = 12h
	BH = 14h
	BL = message modifier
	    00h handle is DWORD on top of stack
	    01h define user stream
	    04h intercept keystrokes from KEYBOARD to window (handle on stack)
	    05h intercept keystrokes from task's default KEYBOARD to a window
	STACK: (if window)   DWORD user stream number (14h-1Fh)
			     DWORD address of FAR user stream handler
	       (if keyboard) DWORD address of FAR filter function (see #00452)
Return: STACK popped