如何从高完整性（管理）进程调用IEGetProtectedModeCookie API？

Question

我需要从高完整性（管理员）流程中调用IE8 IEGetProtectedModeCookie API。每当我从Azure webapp调用此API时，我都会收到 ERROR_INVALID_ACCESS 。我已经在很多地方看到高完整性进程无法调用此API，但在我的情况下，我需要以提升的权限运行Azure沙箱。

有没有办法从较低级别的完整性过程调用此API？对于Azure沙箱，我被迫以提升的权限运行我的webapp。

  [DllImport("ieframe.dll", CharSet = CharSet.Unicode, EntryPoint = "IEGetProtectedModeCookie", SetLastError = true)]
  public static extern int IEGetProtectedModeCookie(String url, String cookieName, StringBuilder cookieData, ref int size, int flag);

  private static string GetProtectedModeIECookieValue(string cookieName)
  {
     String r = String.Empty;

     int iSize = 4096;
     StringBuilder sbValue = new StringBuilder(iSize);

     Uri reqUri = HttpContext.Current.Request.Url;
     string baseUrl = String.Format(@"{0}://{1}", reqUri.Scheme, reqUri.Authority);

     int hResult = IEGetProtectedModeCookie(baseUrl, cookieName, sbValue, ref iSize, 0);

     if (hResult == 0)
     {
        string[] parts = sbValue.ToString().Split('=');
        r = parts[1];
        HttpContext.Current.Response.Write(r);
     }
     else
     {
        //HttpContext.Current.Response.Write("Failed to get cookie. HRESULT=0x" + hResult.ToString("x") + "\nLast Win32Error=" + Marshal.GetLastWin32Error().ToString());
     }

     return r;
  }