how to draw using GtkDrawingArea?

[Aaron Phillips <aaron phillips imagesoft fiserv com>]

Hello 
I'm new to Gtk and need a bit of direction on how to draw (as to a
canvas) in Gtk.  The track I'm on now is to use GtkDrawingArea with Gdk
primitives.  I am having trouble with this.  I am trying to respond to a
GtkImageMenuItem "activate" event by drawing a figure to the drawing
area.  Here is the line that does this:
        gdk_draw_arc (drawingarea->window,
                        drawingarea->style->fg_gc[GTK_WIDGET_STATE(drawingarea)],
                        TRUE,
                        5, 5, 
                        10, 10, 0, 64 * 360);
The problem is nothing happens on the drawing area.  Is there some
refresh-type function I need to call or something, or am i totally on
the wrong track.
Any direction would be much appreciated.
Thanks,
Aaron

-- 
Aaron Phillips
ImageSoft Technologies
2600 Maitland Center Pkwy
Suite 200
Maitland  FL 32751
407-667-3849