System.Diagnostics.Process proc = new System.Diagnostics.Process();
   System.Security.SecureString ssPwd = new System.Security.SecureString();

   proc.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
   proc.StartInfo.CreateNoWindow = false;
   proc.StartInfo.FileName = FindExecutable(cFileName);
   proc.StartInfo.WorkingDirectory = Path.GetDirectoryName(path);
   proc.StartInfo.Arguments = " C:\Ref doc 1.pdf";
   proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
   proc.StartInfo.Domain = "XXXX";
   proc.StartInfo.UserName = "Administrator";

   string password = "xxxxxx";
   for (int x = 0; x < password.Length; x++)
   {
       ssPwd.AppendChar(password[x]);
   }


   proc.StartInfo.Password = ssPwd;
   proc.StartInfo.UseShellExecute = false;
   proc.Start();