I have developed a .net core 3.1 windows service (starttesterservice) that listens for request messages to start a winform tester applcation. The starttesterservice is run with elevated permissions via the app.mainfest:
<?xml version="1.0" encoding="utf-8"?> <assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1"> <assemblyIdentity version="126.96.36.199" name="MyApplication.app" /> <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2"> <security> <requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3"> <requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> </requestedPrivileges> <applicationRequestMinimum> <PermissionSet Unrestricted="true" ID="Custom" SameSite="site" /> <defaultAssemblyRequest permissionSetReference="Custom" /> </applicationRequestMinimum> </security> </trustInfo> <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1"> <application> </application> </compatibility> </assembly>
When the starttesterservice receives a test request message, it starts the winform tester.exe application.
ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.UseShellExecute = true; startInfo.WorkingDirectory = exePath; startInfo.FileName = Path.Combine("c:tester", "tester.exe"); startInfo.Verb = "runas"; startInfo.Arguments = parameters; startInfo.ErrorDialog = true; Process process = Process.Start(startInfo);
The tester application has a app.manifest to elevate it to admin permission as well. Same app.manifest shown above.
When I run the starttesterservice in VS 2019, the windform tester UI gets launched without issue and the test can be completed. However, when I run the starttesterservice as a windows 10 service the Tester UI is not displayed. I’m using my domain user account as the service login account. I have admin privilege’s to the local machine. The admin group has been added to the local security policy. When I send the test request message to the starttesterservice the application is started without the UI being visible. In the task manager I see the tester.exe process is running. I could use some advise on how to get the UI to be displayed so that the user can complete the test.
Source: Windows Questions