XPLMLibraryEnumerator f

XPLMLibraryEnumerator_f

typedef void (* XPLMLibraryEnumerator_f)(
                                   const char *         inFilePath,    
                                   void *               inRef);    

An XPLMLibraryEnumerator_f is a callback you provide that is called once for each library element that is located. The returned paths will be relative to the X-System folder.