You need a basic filter function. Whatever the field in the table is that you
would like to filter (search) on in your form, put a combo box on your form
and (using the combo wizard) select that field for your combo to look up. For
example, if you had 5 columns in your table and one of them was Customer ID,
you would want to search on that column. Then go into the combo's afterupdate
event (click on properties/events) and start the code builder (the little on
the end.) Type this is where the cursor is:
Me. Filter = "[thenameofthecolumnyouaresearching] = """ & Me.the#ofyourcombo
(like combo18) & """"
Me.Filteron = True

Now when the user scrolls through the combo and finds the record they want
that record will come up. You may need to do some tweaking, like getting the
form to close after they have edited that record. Do a search on here and you
should find that no problem.

If you download my word merge example here:

http://www.members.shaw.ca/AlbertKallal/msaccess/msaccess.html

in the above the "super easy word merge" does have a sample search form that
does what  you want.....

If you don't want to build a form, consider placing a search combo box on
the actual form (there is a wizard that will build this searching system for
you).