Re: catching the error number

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 18 Jan 2008 16:00:03 GMT

Message-ID:

<724kj.88326$YL5.43704@newssvr29.news.prodigy.net>

I was totally unaware the CAsynSocket::Listen throw an exception, I thought
that it retunes WSAEADDRINUSE when the port is already in use.

AliR.

"clinisbut" <clinisbut@gmail.com> wrote in message
news:311cfeba-9890-4ec2-b36b-1993a01385d4@d4g2000prg.googlegroups.com...

I'm catching an exception when I try to listen with my WinSocket
control.
To try this code I'm trying to open a socket in a port already used:

try
{
if (m_WinSock.GetState()!=0)
m_WinSock.Close();

m_WinSock.SetLocalPort( portNumber );
m_WinSock.Listen();
}
catch(CException *e)
{
char info[300];
UINT code;
e->GetErrorMessage( info, 300, &code );
TRACE( "Exception opening Server TCP Port: %s -->ID:%d\n", info,
code );
}

I'm trying to get the error ID into the variable "code" and always
getting code=0. I don't know if 0 is the error number for trying to
open a port already used (I did not found any documentation about the
listen() function), or I'm not calling ->GetErrorMessage() correctly.

Is there any way to get the error ID?