[Glade-users] How add new widget to glade pallete?

[k2pfx o2 pl (k2pfx o2 pl)]

Hi! Everybody & Excuse for my weak english! 
 
I'm using Glade ver. 0.6.4 and I'm installed gtk+extra-0.99.17. Because I 
want using gtkplot & gtkplotcanvas widgets.  
 
So, through instalation gtk+extra I obtain files like: gtkplotcanvas.c 
gtkplotcanvas.h gtkplotcanvas.lo gtkplotcanvas.o  
 
Now I'm thinking how add those widgets into Glade?? 
 
Help me, a kind men)