Authentication State Session Property ID in SMTP Tranport Event   

Where i can find PID value of Session Property 
(ISESSION_PID_IS_SESSION_AUTHENTICATED) for chek session is authenticated in 
SMTP transport Event?

void ISmtpInCommandSink.OnSmtpInCommand(object pServer, object pSession, 
MailMsg pMsg, ISmtpInCommandContext pContext) {

try {
 MailMsgPropertyBag Session = new MailMsgPropertyBag(pSession);
 bool isAuthenticated=Session.GetBool(PID);
} catch (Exception e)  {
 Context.CommandStatus = (uint) ProtocolEventConstants.EXPE_COMPLETE_FAILURE;

 throw new COMException("Event is consumed", 
ProtocolEventConstants.EXPE_S_CONSUMED);
 }
}

date: Thu, 29 Nov 2007 03:21:02 -0800   author:   SibGhost