22.214.171.124.16 Resolve (Opnum 22)
The Resolve method, given another event trace data provider or a collection of event trace data providers, updates the properties of the original provider with information from one of the passed-in provider(s). If only one provider is passed-in, information from that provider is used. If multiple providers are passed-in, information is used from the first provider in the collection that has the same value for the ITraceDataProvider::Guid property as the original ITraceDataProvider. The Guid in this context refers to the COM interface property which is used as a PLA-UID and does not comply with the semantics of GUID specified in [C706].
If no provider from the passed-in collection has the same PLA-UID, the original provider is not updated. If the original provider is updated, the DisplayName property of the original provider is overwritten by the DisplayName of the passed-in provider, and the ValueMapItems in the Level, KeywordsAny, and KeywordsAll properties of the passed-in provider replace the ValueMapItems for the existing Level, KeywordsAny, and KeywordsAll properties of the original provider. However, actual value of the Level, KeywordsAny, and KeywordsAll properties are not overwritten. Consequently, the existing settings are not lost; that is, if the level is 5, the symbolic names of all the levels (which are stored as ValueMapItems) are added, but the value of the level remains as 5. For ValueMaps, see section 126.96.36.199.
Because only one provider is used to update the original provider, there is no possibility for conflicting or duplicate properties.
HRESULT Resolve( [in] IDispatch* pFrom );
pFrom: Supplies a pointer to a provider or provider collection object that is used to resolve the properties.
Return Values: This method MUST return an HRESULT with the severity bit clear on success as specified in [MS-ERREF]; otherwise, it MUST return one of the errors as defined in 2.2.1 or one of the errors as defined in [MS-ERREF] section 2.1.