You'll want to modify the manifest that gets embedded in the program. This works on VS2008 and higher: Project + Add New Item, select "Application Manifest File". Change the <requestedexecutionlevel> element to:
<requestedexecutionlevel level="requireAdministrator" uiaccess="false" />
The user gets the UAC prompt when they start the program. Use wisely, their patience can wear out quickly.
Get more info from following article
Requesting Admin Approval at Application Start