Null string constants

The WebSphere MQ constants, used for the initialization of four MQMessage properties, MQMI_NONE (24 NULL characters), MQCI_NONE (24 NULL characters), MQGI_NONE (24 NULL characters), and MQACT_NONE (32 NULL characters), are not supported by WebSphere MQ Automation Classes for ActiveX. Setting them to empty strings has the same effect.

For example, to set the various ids of an MQMessage to these values:
mymessage.MessageId = ""
mymessage.CorrelationId = ""
mymessage.AccountingToken = ""