I was just starting to write a bit about the User Account Control (UAC) feature of Vista. I wanted to show an example of how it dims the screen and shows a prompt when you do certain things, like trying to run a .reg file. To my suprise, I wasn’t able to capture a UAC dialog box (running Vista RC2), the Prnt Scrn key seems to be unusable while the screen is dimmed. Go ahead, give it a try, and if you find a way around it, let me know here by leaving a comment!