Code for an article at Coding4Fun written by Brian Peek of ASPSOFT, Inc..

We are going to build an application that you will copy to a friend’s PC that will, at a specified date and time, cause the computer to appear to start dripping blood down the screen and, after a few seconds, switch to a full-screen image of something terrifying while playing a screaming sound effect. This should sufficiently scare your victim for Halloween.

Code is available in Visual Basic and Visual C#