ImqWorkHeader C++ class
Inserts an MQWIH data structure into the beginning of the message buffer, moving the existing message data further along, and sets the `msg` **format** to MQFMT\_WORK\_INFO\_HEADER.
Inserts an MQWIH data structure into the beginning of the message buffer, moving the existing message data further along, and sets the `msg` **format** to MQFMT\_WORK\_INFO\_HEADER.