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AH = 12h BH = 0Bh BL = mailbox to write to 00h handle is DWORD on top of stack 02h default mailbox of task whose handle is on top of stack 03h current task's default mailbox.STACK:
DWORD status (low byte) DWORD length of message DWORD address of message
Return:
STACK popped
Notes: Only a pointer to the message is stored, but the write may still fail due to insufficient memory. Under DV 2.2+, failed mailbox writes may return CF set (see AX=DE15h)
See Also: AH=12h/BH=0Ah"MAILBOX"
Category: DESQview/TopView and Quarterdeck Programs - Int 15h - T
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