[in] An IDiaSymbol object representing the parent. If this parent symbol is a function, module, or block, then its lexical children are returned in ppResult. If the parent symbol is a type, then its class children are returned. If this parameter is NULL, then symtag must be set to SymTagExe or SymTagNull, which returns the global scope (.exe file).
[in] Specifies the symbol tag of the children to be retrieved. Values are taken from the SymTagEnum enumeration. Set to SymTagNull to retrieve all children.
[in] Specifies the name of the children to be retrieved. Set to NULL for all children to be retrieved.
[in] Specifies the comparison options applied to name matching. Values from the NameSearchOptions enumeration can be used alone or in combination.
[out] Returns an IDiaEnumSymbols object that contains the list of child symbols retrieved.