Parses a file containing a [UI definition][XML-UI] and merges it with the current contents of manager.
the name of the file to parse
The merge id for the merged UI. The merge id can be used to unmerge the UI with gtk_ui_manager_remove_ui(). If an error occurred, the return value is 0.
GException on failure.
2.4
Parses a file containing a [UI definition][XML-UI] and merges it with the current contents of manager.