Display to the Locally Logged On user's screen

[JoshT]

How would I write a program that displays its output to the screen of the user who is logged on locally and physically seated at the computer? I have a utility downloaded from www.sysinternals.com that allows me to execute programs remotely on a NT network, and it works great for command-prompt type programs as it seems to redirect standard input and output to and from my command-prompt. However, I can launch graphical apps, and they run, but they don't display to the user's screen - they just show up under the task lists. I'm assuming they display to a "screen" created for me as a remote log-in - can I force them to the context of the local user?