StrucId (MQCHAR4)

This is the structure identifier; the value must be:

MQPMO_STRUC_ID: Identifier for put-message options structure.
For the C programming language, the constant MQPMO_STRUC_ID_ARRAY is also defined; this has the same value as MQPMO_STRUC_ID, but is an array of characters instead of a string.

This is always an input field. The initial value of this field is MQPMO_STRUC_ID.