VC: Check whether the port is enabled

1,

Void MySocket: OnConnect (int nErrorCode)

{

// TODO: Add your specialized code here and/or call the base class

If (nErrorCode! = 0) // connection failed

AfxMessageBox ("port closed ");

Else

AfxMessageBox ("Open Port ");

 

CAsyncSocket: OnConnect (nErrorCode );

}

2,

CString m_ipstr;

MySocket m_socket;

 

Void CTestDlg: OnConnect ()

{

// TODO: Add your control notification handler code here

If (! AfxSocketInit ())

{

AfxMessageBox ("IDP_SOCKETS_INIT_FAILED ");

Return;

}

GetDlgItemText (IDC_IPADDRESS1, m_ipstr );

M_socket.m_hSocket = INVALID_SOCKET;

UpdateData (true );

// Create a socket

BOOL flag = m_socket.Create ();

If (! Flag)

{

AfxMessageBox ("socket error ");

Return;

}

M_socket.Connect (m_ipstr, m_port); // call the function detection port in the new class at the same time.

 

}