Channel 9 has posted a great screencast about building UAC apps with Visual Studio 2008. From the site:
Introduction: User Account Control is the top compatibility hurdle for some applications moving to Windows Vista. It is relatively easy to comply with some elements of UAC (e.g. embedding a manifest in your app) and with Visual Studio 2008 it is even easier as I show in this video. Relevant blog posts of mine are here and here.
Video download: Click on the image to play the video (from a streaming file). If you'd prefer to download the wmv packaged in a zip file, you may do so here.