MenuItem activate signal

[dhk <dhkuhl optonline net>]

I have a callback that is called when a MenuItem is selected, but in the
callback the paramenter is which is suppose to be the MenuItem is NULL.
 The callback signature is "void user_function (GtkMenuItem *menuitem,
gpointer user_data)".

What I want to do is set menuitem to be insensitive when sellected and
then sensitive when the task it calls is done.

Any ideas?

Thanks,

Dave