CAsyncSocket::OnOutOfBandData

virtual void OnOutOfBandData( int nErrorCode );

Parameters

nErrorCode

The most recent error on a socket. The following error codes apply to the OnOutOfBandData member function:

• 0   The function executed successfully.
  
  
• WSAENETDOWN   The Windows Sockets implementation detected that the network subsystem failed.

Remarks

Called by the framework to notify the receiving socket that the sending socket has out-of-band data to send. Out-of-band data is a logically independent channel that is associated with each pair of connected sockets of type SOCK_STREAM. The channel is generally used to send urgent data.

MFC supports out-of-band data, but users of class CAsyncSocket are discouraged from using it. The easier way is to create a second socket for passing such data. For more information about out-of-band data, see the article Windows Sockets: Socket Notifications in Visual C++ Programmer's Guide and Overview of Windows Sockets 2 and Windows Sockets Programming Considerations in the Win32 SDK documentation.

CAsyncSocket Overview |  Class Members |  Hierarchy Chart

See Also   CAsyncSocket::GetLastError, CAsyncSocket::OnAccept, CAsyncSocket::OnClose, CAsyncSocket::OnConnect, CAsyncSocket::OnReceive, CAsyncSocket::OnSend