Sets an icon to be used as fallback for windows that haven't had gtk_window_set_icon_list() called on them from a file on disk. Warns on failure if @err is %NULL.
location of icon file
%TRUE if setting the icon succeeded.
GException on failure.
2.2
See Implementation
Sets an icon to be used as fallback for windows that haven't had gtk_window_set_icon_list() called on them from a file on disk. Warns on failure if @err is %NULL.