Change Font of GtkClist title

["amitjain" <amitjain webdunia com>]

Hi !!!
I am using Gtk1.2. I wnat to set font for GtkClist title.
I am doint it in this way.

style =  gtk_widget_get_style( clist ) ;
style->font = font_load;
gtk_widget_set_style( clist, style ) ;

But it is not reflecting chang on GtkClist title. 
Please help me.

Thanks in Advance
Amit Jain