I want to open a file from a path stored in a record in access 2007?

I have a database where i store a relative path to a .jpg file. I’ve been looking several tutorials and i’ve managed to show the right picture in a form. Ok! :D but the thing is, now i wnat to click on it and open it. I’ve been trying the shellopen command but i cant seem to get the right sintax… i think it would be something like:

shellopen (relative path parameter).....this and that.

any pointing in the right direction will be greatly appreciated, thanks!