NEED A HELP

Hello MVD!

I need a script in adding a new record with a data source from combobox. The combobox must set to a specific or selected record.  I used the SQLEXECUTE but does not work.

I have a table of Cars and connected to the Properties table of the cars. If I set to TOYOTA as a default cars name during the encoding of the properties no need to search time to time to the combo box of "TOYOTA" car name.

Help and Thanks!