void SetCurrentLibrary(int n);
HWEXT_LIBRARY_MULTIPLEextension bit has been set. See Extension plugins for details. In that case, Hollywood will call
SetCurrentLibrary()to tell your plugin whose library's commands, constants or base table you should return when Hollywood makes the next call to your GetBaseTable(), GetCommands() or GetConstants() functions. The library numbers passed by Hollywood are 0-based, so a value of 0 means the first library. Hollywood will call this function as many times as you've specified in your GetLibraryCount() implementation. See GetLibraryCount for details.