Sets the application title to the given string.
mov  ah, 16h           ; Windows multiplex function
mov  al, 8Eh           ; VM Title
mov  di, seg AppTitle  ; see below
mov  es, di
mov  di, offset AppTitle
mov  dx, 0             ; Set Application Title
int  2Fh
cmp   ax, 1
je   success
Returns 1 in the AX register if successful or zero otherwise.
Although not common, Set Application Title may return 1 in the AX register even though the title was not changed. In general, applications must not rely on the operating system to keep an accurate copy of the current title.