help needed with gdk_drawable_get_size

[Jered Bolton <jbolton elec gla ac uk>]

Hi,

I'm trying to determine the size of a drawing area using
gdk_drawable_get_size, as documented in the GDK online reference
manual.  I'm a bit of a newbie to all this, but I had a peek in
/gdk/gdk.h and it doesn't seem to be in there, so does it still exist?
If not, how else can I determine the size of a drawing area?

Jered.