一、创建本地套接字
m_sockRecv.Create(5801,SOCK_DGRAM,"127.0.0.1");
二、绑定本地套接字
m_sockRecv.Bind(5801,"127.0.0.1");
三、添加一个按钮,用于接收数据
void CUdp_serverDlg::OnButton1()
{
// TODO: Add your control notification handler code here
char szRecv[20];
CString szIP("127.0.0.1");//发送端IP
UINT uPort = 5800;//发送端端口号
int iRecv = m_sockRecv.ReceiveFrom(szRecv,10,szIP,uPort,0);//接收UDP数据
TRACE("received %d byte\n",iRecv);
szRecv[iRecv] = '\0';
m_Strrecv = szRecv;
UpdateData(FALSE);//编辑框更新显示
}