[Glade-users] how to change font label

[xhonghar telkom net (Hariyanto)]

I am using Glade 1.1.3, I cannot be able to change the text size on labels
Is there on option on the Glade panels to change text or font size? 
If not can you direct me to finding the proper code for "C" to be able 
to change font or text size? And I have try this code

void
apply_font_to_widget (GtkWidget *widget, gchar *fload)
{
    GtkStyle *style = gtk_style_new();
    gdk_font_unref(style->font);
    style->font = gdk_font_load(fload);
    gtk_widget_set_style(GTK_WIDGET(widget), style);
}

But I get this error "structure has no member named `font'" 

Thank you for your time.