If you really want to do this, you can use: RunCommand
acCmdLinkedTableManager. Put that on the open event of whatever your
startup form is.
If you are trying to make sure you relink your tables, check out this
post:
http://www.mvps.org/access/tables/tbl0009.htm. It shows how you
can use code to do this automatically without using the linked table
manager.
Keven