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Call this member function to get the local name for a socket (handles IPv6 addresses).

BOOL GetSockNameEx( 
   CString& rSocketAddress, 
   UINT& rSocketPort  


Reference to a CString object that receives a dotted number IP address.


Reference to a UINT that stores a port.

Nonzero if the function is successful; otherwise 0, and a specific error code can be retrieved by calling GetLastError. The following errors apply to this member function:

  • WSANOTINITIALISED   A successful AfxSocketInit must occur before using this API.

  • WSAENETDOWN   The Windows Sockets implementation detected that the network subsystem failed.

  • WSAEFAULT   The lpSockAddrLen argument is not large enough.

  • WSAEINPROGRESS   A blocking Windows Sockets operation is in progress.

  • WSAENOTSOCK   The descriptor is not a socket.

  • WSAEINVAL   The socket has not been bound to an address with Bind.

This call is the same as CAsyncSocket::GetSockName except that it handles IPv6 addresses as well as older protocols.

This call is especially useful when a Connect call has been made without doing a Bind first; this call provides the only means by which you can determine the local association which has been set by the system.

Header: afxsock.h

© 2014 Microsoft