How to tell if Windows desktop is fully functional (loaded) c#

Question

I am writing an application that runs on Windows logon but I want it to wait until the desktop is fully functional/loaded before it actually starts doing anything. Is there any way of working out when Windows has completely finished loading the desktop?

Answer 1

Very old question but I needed the same. The following code seems to work:

        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        // wait until desktop ready

        IntPtr lHwnd = IntPtr.Zero;
        do
        {
            lHwnd = FindWindow("Shell_TrayWnd", null);
            Thread.Sleep(100);
        } while (lHwnd == IntPtr.Zero);