I have an application that sends keystrokes to the computer using sendkeys. This works fine when the user is logged in. However, if a UAC window is open or the user is on the Windows Login screen , the sendkeys doesn't work. My understanding is that the UIPI requires code signing of my application. Can anyone provide me with a complete how-to, step-by-step guide on how to get my application able to access the UAC and login screens? I'm using VB.NET. Thanks