I think my question wasn't clear.How do i disbale UAC? I know how to do it manually if i am on thesystem.But, remember, my users don't know anything about this. I just need to give them the setup and need the application to disable UAC by itself(without user intervention) and start working. Okay think of those users as a grand ma. And think of she doesn't know about control panel.... I need my application to be used still by even such users.
Hope its clear now.

Thanks,
zolyit

There are some registry keys you need to change if you WANT to do it programatically.

Hi zolyita,

As far as I know, we can't disable UAC programmatically, but we can force the program to run with elevated privileges from the start, so it doesn't prompt each time. This would have the program prompt only once and the user needs not to check it again.

To do this, we can create a manifest file and set this property:
<requestedExecutionLevel level="requireAdministrator">

You can get more information from:
http://msdn.microsoft.com/en-us/library/bb756929.aspx.

Let me know if this helps.
Aland Li