I'm just looking to the Ref Manual, to the Editable subprograms.
I found
procedure Get_Chars
(Editable : access Gtk_Editable_Record;
Start_Pos : in Gint := 0;
End_Pos : in Gint := -1);
but I don't know what to do with that.
Isn't it a Get_Text function returning a String?