管理服务：将用户登录到桌面，生成可与桌面交互的进程

I'm having a difficult time getting a very specific use case to work. The application in question has two components: a Windows service, which needs to run in a privileged context outside of the desktop (i.e. to accept connections while a user is logged in or not) and a client Winforms app. The service accepts websocket connections, and should the connection request succeed, it is supposed to log the user in interactively (into the desktop) and spawn a process as that user with desktop access. I've used the following links, and while they are able to impersonate a user, they don't actually log the user into the desktop, i.e. if I watch the system using VNC, or if I test it on my local system, the user doesn't get logged in. The process does, however, get spawned as the user, but obviously not with desktop access.I'm having a difficult time getting a very spec