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Article View: borland.public.cppbuilder.internet.socket
Article #2539

Re: Bind to a specific port

#2539
From: Remy Lebeau (TeamB)
Date: Mon, 20 Mar 2006 00:23
31 lines
1935 bytes
"Orlando Lopez" <hlopezrd@hotmail.com> wrote in message
news:441de6db@newsgroups.borland.com...

> My problem is that I have an Array of TClientSocket, and when
> the OnLookup event is triggered I have to check the Address and
> the Port number of the current TClientSocket that is in this event to
> bind with an specific port. But the RemoteAddress, LocalAddress,
> LocalPort, RemotePort are all nulls or cero.

As they should be, because the socket is not connected yet when the event is
triggered, and those proerties only work on connected sockets.

> What can I do?

Like every oter event handler in the VCL, the Sender parameter points to the
particular object that is triggering the event - in this case, the
TClientSocket object that you are looking for:

    void __fastcall TForm1::ClientSocket1Lookup(TObject *Sender,
TCustomWinSocket *Socket)
    {
        TClientSocket *Client = dynamic_cast<TClientSocket*>(Sender);
        if( !Client )
            return;

        // ...
    }


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Subject: Re: Bind to a specific port
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