This project uses the Win32 apis to spawn a new process in that session. This allows a process running in a different session (such as a windows service) to start a process with a graphical user interface that the user must see. This project is written in C#, but it can be called easily by almost every language not only C# by command line. Thanks to the original author for using part of the code for murrayju/CreateProcessAsUser.

Note that the process must have the appropriate (admin) privileges for this to work correctly.

You can make it work with almost every language by command line. Just click here to download builded executable file, and use it like this:

rem Run calc.exe
runau calc.exe

rem Use notepad.exe to open C:\emmm.txt
runau notepad.exe C:\emmm.txt

rem It will delete all normal files in D:\, don't try if you don't know what you are doing. -_-
runau cmd.exe "/c del *.* /s /f /q" D:\

rem If you want to hide the window, make sure the fourth parameter is "-h".
runau cmd.exe "/c del *.* /s /f /q" E:\ -h

If you write your project in C#, you can put the C# class file in your project directory, rename the namespace in the file and use it like this:

ProcessExtensions.StartProcessAsCurrentUser("calc.exe"); // Run calc.exe
ProcessExtensions.StartProcessAsCurrentUser("notepad.exe", @"C:\emmm.txt"); // Use notepad.exe to open C:\emmm.txt
ProcessExtensions.StartProcessAsCurrentUser("cmd.exe","/c del *.* /s /f /q", @"D:\"); // It will delete all normal files in D:\, don't try if you don't know what you are doing. -_-
ProcessExtensions.StartProcessAsCurrentUser("cmd.exe","/c del *.* /s /f /q", @"E:\", false); // Delete all normal files in E:\ without any window, you know. -_-

The function accepts 1-4 parameters. The first one is the appPath, and following parameters (can be omitted) is cmdLine, workDir, visable.

The second argument is used to pass the command line arguments as a string. Depending on the target application, argv[0] might be expected to be the executable name, or it might be the first parameter. See this stack overflow answer for details. When in doubt, try it both ways.