Int 15 Fn 12 - Topview - Send Message - "read" - Wait For Timer To Expir [Q]
AH = 12h
BX = 0400h
STACK: DWORD timer's handle
Return: after timer expires
STACK: DWORD time in 1/100 sec after midnight when timer expired
See Also: AH=12h/BH=0Ah,AH=12h/BH=84h