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.