GTK+ Problem

[asterik]

Hmm... ok heres the code:


void
on_button44_clicked (GtkButton *button,
gpointer user_data)
{
GtkWidget *label1;
char bufferl[32];

sprintf (bufferl, "untitled");
label1 = gtk_label_new (bufferl);
gtk_signal_connect_swapped (GTK_OBJECT (notebook1),"newpage",gtk_notebook_prepend_page (GTK_NOTEBOOK (notebook1), textview1, label1), app1);
}


Now.. i get this error:


callbacks.c: In function `on_button44_clicked':
callbacks.c:414: invalid use of void expression
make[2]: *** [callbacks.o] Error 1


Could someone help? Im trying to append a page to 'notebook1' and im readin the tutorial from:

http://wingtk.sourceforge.net/ishan/glade.html

and im using glade

[709394]

Need more info.
What is line # 414?
...