understanding gtype and gobject

[abhishek desai <abhi00 gmail com>]

I am trying to understand the gtype system and the gobject system.
http://developer.gnome.org/gobject/stable/

Unable to figure out the difference between the gobject constructor
and the gtypes instance_init function. Why do we use a constructor
function in gobject ? Can we not do the functionality in the
instance_init itself ?

-
abhi