msggetdat
msggetdat ?-cvtnull char? ?-type type? msgId ?offset? ?length?
This command returns message data from the region that is specified by
offset
and length
in a datum object.
Nulls in the retrieved data are converted to char
if -cvtnull
is used.
The datum object is type ch
unless
another type value is specified.
This command returns the new datum object’s handle.