Longitude / Latitude from UK post code - Google Maps

We have a classic ASP website with an Access database storing addresses. For each postcode I need the longitude and latitude figures obtaining from Google geocoding and inserting into the database. I then need the code to plot the position on a google map. The map must be "active" as in the this example [login to view URL] The code will need to be incorporated into the website by myself and approved before the project is considered complete.