INT 15 - TopView - SEND MESSAGE - "SETNAME" - ASSIGN NAME TO MAILBOX
Input
Output
AX
12h
AX
BX
11h
Mailbox to Name
BX
CX
CX
Stack
DWORD
Length of Name
DX
Stack
DWORD
Address of Name
ES:DI
Mailbox to Name:00h DWORD on top of stack is mailbox handle
02h use given task's mailbox (task's handle on top of stack)
03h use current task's default mailbox