gtk_toolbar_append_element has been deprecated since version 2.4 and should not be used in newly-written code. Use gtkToolbarInsert instead.
gtkToolbarAppendElement(object, type, widget, text, tooltip.text, tooltip.private.text, icon, callback, user.data = NULL)objectGtkToolbar.typeGtkToolbarChildType that determines what widget will be.widgetGtkWidget, or NULL. [ allow-none ]texttooltip.texttooltip.private.texticonGtkWidget that provides pictorial representation of the element's function.callbackuser.datatype == GTK_TOOLBAR_CHILD_WIDGET, widget is used as the new element.
If type == GTK_TOOLBAR_CHILD_RADIOBUTTON, widget is used to determine
the radio group for the new element. In all other cases, widget must
be NULL.
callback must be a pointer to a function taking a GtkWidget and a gpointer as
arguments. Use gCallback() to cast the function to GCallback.