Look into ServiceController Class, which is used for control Wndows
Services.

You can build a standard Win Form App on Service Controller class to
monitor/control the Windows Service(s). Almost all books on Windows Service
have an example of Win Form app, using ServiceController class.

Create an installer class for your service project.

Override the Install method, like so:

    public override void Install(IDictionary stateSaver) {
        base.Install(stateSaver);
               SetInteractWithDesktop();
       }

        private void SetInteractWithDesktop() {
            RegistryKey fm;
            ServiceType type;

            fm = Registry.LocalMachine.OpenSubKey(
@"SYSTEM\CURRENTCONTROLSET\SERVICES\<your_service_name>, true );

            type = ServiceType.InteractiveProcess |
ServiceType.Win32ShareProcess;
            fm.SetValue( "Type", (int)type );

            fm.Close();
        }

That will modify the registry properly to check the Allow interaction
with desktop setting.

HTH.
Andy