2.2.4.5.3 XAUSER_XACT_MTAG_OPEN

The XAUSER_XACT_MTAG_OPEN message opens an XA Transaction Branch to exchange transactional information.

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MsgHeader (24 bytes)
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guidXaRm (16 bytes)
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XAUow (144 bytes)
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MsgHeader (24 bytes): This field MUST contain a MESSAGE_PACKET structure:

• The dwUserMsgType field MUST be 0x00004012.

• The dwcbVarLenData field MUST be 160.

guidXaRm (16 bytes): This field MUST be a GUID that specifies an XA Superior Transaction Manager Identifier for the XA Superior Transaction Manager.

XAUow (144 bytes): This field MUST contain an XA_UOW structure that specifies a length-qualified XA Transaction Branch Identifier.