MsgUserData (MQCHAR32)

This field specifies channel message exit user data.

This data is passed to the channel message exit in the ExitData field of the ChannelExitParms parameter (see MQ_CHANNEL_EXIT).

This field initially contains the data that was set in the channel definition. However, during the lifetime of this MCA instance, any changes made to the contents of this field by an exit of any type are preserved by the MCA, and made visible to subsequent invocations of exits (regardless of type) for this MCA instance. Such changes do not affect the channel definition used by other MCA instances. Any characters (including binary data) can be used.

The length of this field is given by MQ_EXIT_DATA_LENGTH.

This field is not relevant in IBM MQ for IBM i.