3.17.4.1.26 CorrelationId (Opnum 32)
The CorrelationId method is received by the server in an RPC_REQUEST packet. In response, the server MUST return the application-specific Message.CorrelationIdentifier.
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[propget] HRESULT CorrelationId( [out, retval] VARIANT* pvarMsgId );
pvarMsgId: A VARIANT array of BYTES (VT_ARRAY | VT_UI1) that contains the application-specific CorrelationIdentifier for the Message.
Return Values: The method MUST return S_OK (0x00000000) on success or an implementation-specific error HRESULT on failure.
When processing this call, the server MUST follow these guidelines:
Set the pvarMsgId output parameter to the value of the represented Message.CorrelationIdentifier.