网络基础学习笔记二------UDP通信之客户端

一、创建本地套接字

m_sockSend.Create(5800,SOCK_DGRAM,NULL);

二、绑定本地套接字

m_sockSend.Bind(5800,"127.0.0.1");

三、新建一个按钮，用于发送数据

void CUdp_clientDlg::OnButton1() 
{
// TODO: Add your control notification handler code here
static iIndex = 0;
char szSend[20];
sprintf(szSend,"%010d",iIndex++);
int iSend = m_sockSend.SendTo(szSend,10,5801,"127.0.0.1",0);//发送UDP数据
TRACE("send %d byte\n",iSend);
m_Strsend = szSend;
UpdateData(FALSE);//编辑框更新显示
}