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VSupported on OpenVMS
xcall TTMBX(status, channel, option[, mailbox])
Returned with a value that indicates the status of the operation: (n)
0 = The operation failed.
n = The system channel on which the mailbox was opened.
A Synergy DBL channel opened to a terminal. (n)
Specifies whether the mailbox will be assigned to or deassigned from a channel: (n)
0 = Deassign a mailbox from a channel.
1 = Assign a mailbox to a channel.
(optional) Returned with the name of the mailbox created by the TTMBX subroutine. (a)
The TTMBX subroutine associates a mailbox with a channel opened to a terminal type device.
You cannot spawn DCL commands when a mailbox is assigned to the controlling terminal.