How do i graft two plants together?

Question:i wanted to graft two plants together, say raspberry and strawberry, or black raspberry and red raspberry. Any ideas or tips on how to go about doing this?

Answers:
if you have any type of orchard near you, particularly an apple orchard - ask them for some grafting info - I think that apple trees have to be grafted initially in order to get fruit. I don't think that you'd be able to graft plants from different families together though.the raspberry/ blackberry might be possibel, but I don't think the raspberry/strawberry would work - although it would be nice! Good luck.