Data Combo populate

Thank you very much for your help. I have another question. This company data is part of a bigger database that i need to update. I actually have four tables in the database. The main table is a Project Table which holds the primary key (project number) and other data about the project (jobsite info, billing info). The Project Contacts table holds the primary key project num (to relate it with the project table) and the contact ID. The next table is the Contact Table which holds the primary key Contact ID and all the information about the contacts (phone, mobile number, fax) and the company ID. The last table is the Company Table which holds the primary key company ID and all the company information about the contact (company address, phone, fax). Having filled in the company info from the data combo how do i update all the corresponding tables? By the way i'm using ADO controls and access 2000 as a back end. Thanks in advice for your help.