The GtkLabel you want to set the pattern to. The GtkLabel widget you want to set justification for. The GtkLabel widget you want to get the text from. The GtkLabel you want to affect. The string you want to parse for underlines.
TRUE makes it break lines if text exceeds the widget's size.
The GtkLabel you want to set line wrapping for. It overwrites any text that was there before. Note that underlines that were there before do not get overwritten. The GtkLabel you want to set the text for. The actual label text.