gtk:ui-manager-add-ui-from-file (manager filename)

manager -- a gtk:ui-manager object
filename -- a string with the name of the file to parse

The unsigned integer with the merge ID for the merged UI. The merge ID can be used to unmerge the UI with the gtk:ui-manager-remove-ui function. If an error occurred, the return value is 0.

Parses a file containing a UI definition and merges it with the current contents of manager. The gtk:ui-manager-add-ui-from-file function has been deprecated since version 3.10 and should not be used in newly written code.