1)Can we use Automatic Updater for VBA Access file?
No. The AutomaticUpdater is only for .NET apps. You can use wyUpdate as a standalone updater
(which lets you do everything that the AutomaticUpdater can do, except you have to use commandline arguments instead of an API access).
2)At Present iam able to download updates from my server.
The way the update appears to work is that when an update is found it initiates the download and update. I want to change this tool to download it silently and an update notification(window) should appears when the update is fully downloaded. Could you please tell how can i change it?
You can't with wyUpdate as a standalone updater (you can, however, with the AutomaticUpdater). Or you can use wyUpdate in a Windows Service
and have the Windows Service notify your VBA app that the download is complete.
3)Is there a way for wyBuild to restart the app when update is finsished if it is not an executable file(.accdr)?
Yes. Use a batch file to launch the accdr file however you open it (I presume by passing the file as an argument to Access) and execute that batch from wyUpdate after the update completes successfully