Searching table from field/form to return record to form...

[Paro]

I created a new table with all the appropriate fields,
added a dummy record for testing purposes. I need to be
able to search this table from a form and specifically the
Last Name field. Either onEnter or onChange it would
search that table (TableX) and auto-fill the entire form
from the record contents.

I attempted this a number of different ways, but none
work. Any help please.
Access 2K