3.17.4.1.30 Label (Opnum 36)
The Label method is received by the server in an RPC_REQUEST packet. In response, the server MUST return the represented Message.Label.
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[propget] HRESULT Label( [out, retval] BSTR* pbstrLabel );
pbstrLabel: A pointer to a BSTR that contains the application-defined string description of 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:
If the represented Message.Label equals NULL:
Set the pbstrLabel output parameter to an empty BSTR ("").
Else:
The pbstrLabel output parameter MUST contain the value of the represented Message.Label.