First, how are your tables set up?
To use "autofill" feature, you must have a specific table structure.
I'll assume an Employee, Time Card scenario.
Table: Employees
Field:EmpNumber - Indexed, Primary Key
Field:FIrstName
Field:LastName
etc.
Table: Time Card Data
Field:EmpNumber - Related 1-* with Employee table
Field:JobNumber
Field:StartTime
etc.
In this structure, by referencing the empnumber field in the employees table, all related information is available.
You can autofill a number of ways, this is the easiest. Create a query in the recordsource of the form and include both related tables. Add the desired lookup data from the related table, and bind it to controls on the form.
You will not store the information in the table, but just display it on the form.
*Hope I haven't been too long winded*
Duane Barker