wwpp,
If you have set up the VPN on the host computer (Office server/computer), you can accees it by Remote Desktop Connection (menu path Start> All Programs> Accessories) from home computer or laptop. Once RDC window appears, you type IP addr of the Office computer followed by :3389 i.e. xx.xx.xxx.xxx:3389. Then a new window will ask for userid & password (like Administrator or other userid you have set to access via VPN). For more secured connection you can add one more layer of security (different userid & password).
(PS: Remote desktop is fast but not be the best secured connection. That is why you add one more layer of security. But RDC comes free with windows.)
Now you are connected to office computer. You will be able to open AC if you log in as Administartor (or the user id you have given admin priveledges to). Open Dragon on the laptop, go to the VPN window, you will see Dragon's menu bar at the very top.
Hope this helps.
Sachin
FL