get size of drawing area

["Riswick, J.G.A. van" <J G A v Riswick tue nl>]

HI

I'd like to redraw a drawing, after a drawingarea
has resized, and I'd like to make the drawing
scale up with the drawingarea. So I need the
size of the drawingarea. I tried to use 'size_request'
but failed to make it work. How does one get the
size of a drawing area?

jos