Table control listbox problem

I have this problem with my table control.

I have a Reference Table Input help and I need to populate the values from the selected table names(selected from the input help) into the table control's dropdownbox of my first column with the respective table fields of the selected table name displayed.

Refer to this diagram if unclear: [http://img166.imageshack.us/img166/1066/tablecontrolwt4.png]

Please give me sample codes.

thanks.

will reward marks if useful.