int BrowserVer, RegVal;

        // get the installed IE version
        using (WebBrowser Wb = new WebBrowser())
            BrowserVer = Wb.Version.Major;

        // set the appropriate IE version
        if (BrowserVer >= 11)
            RegVal = 11001;
        else if (BrowserVer == 10)
            RegVal = 10001;
        else if (BrowserVer == 9)
            RegVal = 9999;
        else if (BrowserVer == 8)
            RegVal = 8888;
        else
            RegVal = 7000;

        // set the actual key
        using (RegistryKey Key = Registry.CurrentUser.CreateSubKey(@"SOFTWAREMicrosoftInternet ExplorerMainFeatureControlFEATURE_BROWSER_EMULATION", RegistryKeyPermissionCheck.ReadWriteSubTree))
            if (Key.GetValue(System.Diagnostics.Process.GetCurrentProcess().ProcessName + ".exe") == null)
                Key.SetValue(System.Diagnostics.Process.GetCurrentProcess().ProcessName + ".exe", RegVal, RegistryValueKind.DWord);