Message Area Length is a 2-byte field that is the length of the area pointed to by the Message Area Pointer field.
The value is equivalent to the maximum length of a message that can be returned in that area.
CLI does not alter this value, so after it is set, it remains unless changed by the application.
|C: DBCAREA.H:||dbciMsgM (case-sensitive)|
|Used by||Action Taken|
If the Message Area Pointer is not specified, this value is ignored.