Plots x_y diagram

[ferri_marllo gva es]

Hello!!
I'm making an application using Gtk_glade.
I need to plot points in an X-Y diagram,but i need to can interact with them...i
want to can use my cursor to read them,and to can delete each of them if it's
not good.
How can i do it??
I read something about gtk_extra,but i'm using windows 98 and i think it's not
in a good way!!
So...can someone help me??

Thanks a lot.