How do I link a vertice from one object to a vertice in another object?

I hope this can be done:
How do I link a vertice from one object to a vertice in another object. When moving object one, the vertice in object 2 should move.
:confused:

Yep can be easily done using hooks… http://mediawiki.blender.org/index.php/Manual/Hooks

Thanks N30N!