Radio_Menu_Item get_active?

[Christian Schneider <christian_schneider_2000 yahoo de>]

Hallo,

I want to use a function like the
gtk_toggle_button_get_active for Radio-Buttons in the
Menubar.

At the moment I use the following call:
gtk_check_menu_item_get_active (GTK_CHECK_MENU_ITEM
(radiobutton));

But when this call is reached I get an error:
"(programm.exe:2612): Glib_GObject-Warning **: invalid
cast from 'GtkMenuItem' to GtkCheckMenuItem
(programm.exe:2612): Gtk-CRITICAL ** file
gtkcheckmenuitem.c line 225
(gtk_check_menu_item_get_active): assertion
'GTK_IS_CHECK_MENU_ITEM (check_menu_item)' failed
"
But the function returns the right value (FALSE if is
not active and TRUE if it is active).
How can I avoid this error message? 

Regards

Christian SChneider


        

        
                
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