>You should check for ReadyState == 4 which tells you when the DOM has completed loading.

Thanks, I have adjusted for that:

        Dim loHTMLDocument As mshtml.HTMLDocument = Nothing
        Dim loInternetExplorer As SHDocVw.InternetExplorer = Nothing

        loInternetExplorer = New SHDocVw.InternetExplorer
        loInternetExplorer.Visible = True
        loInternetExplorer.Navigate("MyUrl")
        apiShowWindow(loInternetExplorer.HWND, SW_MAXIMIZE)
        Do While (loInternetExplorer.Busy)
            System.Threading.Thread.Sleep(100)
        Loop
        Do While (loInternetExplorer.ReadyState <> 4)
            System.Threading.Thread.Sleep(100)
        Loop
        loInternetExplorer.Document.getElementById("Username").Value = "MyUsername"
        loInternetExplorer.Document.getElementById("Password").Value = "MyPassword"
        loInternetExplorer.Document.getElementById("Form1").submit()

But, this triggers the problem immediately.

Is this the design you wanted me to try?