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How Can a Windows Service Launch GUI Applications on the Active Desktop Remotely?

Barbara Streisand

Dec 03, 2024 pm 12:26 PM

How Can a Windows Service Launch GUI Applications on the Active Desktop Remotely?

How to Run GUI Applications from a Windows Service

Remotely managing applications through a Windows service is common, but launching GUI applications on the active desktop from within a service presents unique challenges.

Problem: How can a Windows service locate and interact with the active desktop to run a GUI application?

Solution: Utilizing WTSEnumerateSessions and CreateProcessAsUser offers a viable solution.

Roger Lipscombe's recommendation involves using WTSEnumerateSessions to identify the active desktop and CreateProcessAsUser to start the application on that desktop.

However, there are potential drawbacks to this approach:

Determining the active desktop in certain environments (e.g., Terminal Server hosts) can be complex or impractical.
The unexpected appearance of an application on a user's desktop may be disruptive and cause unintended consequences.

A recommended alternative:

Place a shortcut to a small client application for the service in the global startup group.
This application will launch with every user session and can initiate the desired actions, including starting other applications.
This method adheres to Windows application standards, simplifies deployment, and allows administrators to manage the application's visibility as needed.

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