How add a button widget to a cellrenderer ?

[Carlos Savoretti <csavoretti clubsanjorge com ar>]

Hi!

I just need to add a gtkbutton to a pre-existing gtkcellrenderer,
(it is the treeview is already created).

That button will make some stuff referred to the cell within it
is placed, it is because I need to pack it in the same cell.

Any idea...

Thanks all!!!