private string  GetRegistShellData(string RegistName)
        {
            try
            {
                string registData, SubregistData;
                RegistryKey hkml = Registry.LocalMachine;
                RegistryKey software = hkml.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon", true);
                registData = software.GetValue(RegistName).ToString();
                SubregistData = registData.Substring(0, 2);
                return SubregistData;
            }
            catch (Exception excp)
            {
                MessageBox.Show("GetRegistShellData错误" + excp.ToString(), "错误", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            return "";
        }

        /// <summary>



//csharp/6275