Jane,
In the Valid event of the first name field you can refer to the value of the last name field like this:
THISFORM.txtlName.Value or THIS.Parent.txtlName.Value
>I want to be able to input a last name & a first name. Then I want to check the table to see if that person is already there. If so, I'd like the record pointer to go to that record & the information for that person will appear on the screen and it can be changed. If it's not there, I want a new record to be added to the table. I put some code in the Valid event of the first name field but it didn't recognize txtlname (which is what I called the text box for the lastname field).