基于VC的MFC界面开发

教你熟悉VC6.0创建一个可视化软件的过程

UpdateData(TRUE);//将输入数据赋给文本框变量。
UpdateData(FALSE);//将内容显示在文本框中
AfxMessageBox("演示弹窗");

当使用弹窗的时候会阻塞进程。

使用VC++6.0开发一个弹窗程序

进阶（未实现）：VC++6.0可视化窗口怎么填加图片

本例是基于C语言实现的Windows socket的编程。

注意，在新建时不要勾选“Windows Socket”，因为用到了<winsock2.h>，勾选后会报错，说有一个结构体被定义了两次：

（这前面是你的VC安装路径）include\winsock2.h(99) : error C2011: 'fd_set' : 'struct' type redefinition

参考代码如下：

// 333Dlg.cpp : implementation file
//客户端
#include "stdafx.h"
#include "333.h"
#include "333Dlg.h"
#include <stdlib.h>
#include<Winsock2.h>
#pragma comment (lib,"ws2_32.lib")
#define BUFFER_SIZE 1024
#define MY_PORT 3434
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMy333Dlg dialog
CMy333Dlg::CMy333Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMy333Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMy333Dlg)
	m = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMy333Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMy333Dlg)
	DDX_Text(pDX, IDC_EDIT1, m);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMy333Dlg, CDialog)
	//{{AFX_MSG_MAP(CMy333Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMy333Dlg message handlers
BOOL CMy333Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	// TODO: Add extra initialization here
	return TRUE;  // return TRUE  unless you set the focus to a control
}
// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.
void CMy333Dlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting
		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;
		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}
// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMy333Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
void CMy333Dlg::OnButton1()
{
	// TODO: Add your control notification handler code here
		// TODO: Add your control notification handler code here
	SOCKET conn_sock;
	struct sockaddr_in client_addr;
	//WSA初始化
	WSADATA wsadata;
	WSAStartup(MAKEWORD(1,1),&wsadata);
	//配置connect
	conn_sock = socket(AF_INET,SOCK_STREAM,0);
	bind(conn_sock,(struct sockaddr*)&client_addr,sizeof(struct sockaddr));
	//配置server addr
	client_addr.sin_family = AF_INET;
	client_addr.sin_port = htons(MY_PORT);
	client_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
	//链接
	connect(conn_sock,(struct sockaddr *)&client_addr,sizeof(struct sockaddr));
	//接收
	char rc[100] = "";
	recv(conn_sock,rc,sizeof(rc),0);
	//printf("From Server : %s\n",rc);
	AfxMessageBox("连接成功！");
	//输入路径
	//printf("Please input path:\n");
	//char path[100];
	//scanf("%s",&path);
	//发送路径
	//send(conn_sock,path,strlen(path),0);
	//打开文件，准备写入
	FILE * fp = fopen(m, "rt");
	if(NULL == fp)
	{
		//printf("File: %s Can Not Open To Write\n", path);
		AfxMessageBox("打开文件失败！");
		system("pause");
		exit(1);
	}
	else
	{
		char buffer[BUFFER_SIZE];
		memset(buffer, 0, BUFFER_SIZE);
		int length = 0;
		//发送文件内容，直到读不到文件
		while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
		{
			if (send(conn_sock, buffer, length, 0) < 0)//向服务端发送
			{
				//printf("Send File: %s Failed\n", path);
				AfxMessageBox("发送失败！");
				break;
			}
			memset(buffer, 0, BUFFER_SIZE);
		}
		//printf("File: %s Transfer Successful!\n", path);
		AfxMessageBox("发送成功！");
	}
	fclose(fp); //关闭文件
	closesocket(conn_sock);
	WSACleanup();
}
void CMy333Dlg::OnChangeEdit1()
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);//将输入数据赋给文本框变量。
	UpdateData(FALSE);//将内容显示在文本框中
}

// 111Dlg.cpp : implementation file
//服务器端
#include "stdafx.h"
#include "111.h"
#include "111Dlg.h"
#include <Winsock2.h>
#pragma comment (lib,"ws2_32.lib")
#define BUFFER_SIZE 1024
#define MY_PORT 3434
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMy111Dlg dialog
CMy111Dlg::CMy111Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMy111Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMy111Dlg)
	m = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMy111Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMy111Dlg)
	DDX_Text(pDX, IDC_EDIT1, m);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMy111Dlg, CDialog)
	//{{AFX_MSG_MAP(CMy111Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnStart)
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMy111Dlg message handlers
BOOL CMy111Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	// TODO: Add extra initialization here
	return TRUE;  // return TRUE  unless you set the focus to a control
}
// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.
void CMy111Dlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting
		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;
		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}
// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMy111Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
void CMy111Dlg::OnStart()
{
	// TODO: Add your control notification handler code here
	//WSA初始化
	WSADATA wsadata;
	char *buffer = "Welcome ! Server connected.";//字符串
	struct sockaddr_in server_addr;
	SOCKET listen_socket;
	WSAStartup(MAKEWORD(1,1),&wsadata);
	//配置server addr
	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons(MY_PORT);
	server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
	//配置listener
	listen_socket = socket(AF_INET,SOCK_STREAM,0);
	bind(listen_socket,(struct sockaddr*)&server_addr,sizeof(struct sockaddr));
	int flag = 1;
	while (flag)
	{
		//开始监听
		listen(listen_socket,5);
		int dummy = sizeof(SOCKADDR);
		//printf("Listening to client...\n");
		AfxMessageBox("等待客户端连接......");
		//建立连接
		SOCKET new_socket = accept(listen_socket,NULL,&dummy);
		//printf("Client connected!\n");
		AfxMessageBox("连接成功！准备从客户端接收文件......");
		//发送信息
		send(new_socket,buffer,strlen(buffer),0);
		char rc[100] = "";
		//recv(new_socket,rc,sizeof(rc),0);
		//printf("File name from Client : %s\n",rc);
		//char path[100];
		char buf[999];
		//printf("Please set a path to save file:\n");
		FILE * fp = fopen(m, "wt");//以写入的方式打开文件
		if (NULL == fp)
		{
			//printf("File: %s Not Found\n", path);
			AfxMessageBox("写入文件失败！");
		}
		else
		{
			memset(buf, 0, BUFFER_SIZE);
			unsigned int length = 0;
			//接受到客户端发来的文件数据
			while ((length = recv(new_socket, buf, BUFFER_SIZE, 0)) > 0)
			{
				//把发来的数据写入到文件中
				if (fwrite(buf, sizeof(char), length, fp) < length)
				{
					//printf("File: %s Write Failed\n", path);
					AfxMessageBox("接收失败！");
					break;
				}
				memset(buf, 0, BUFFER_SIZE);
			}
			//printf("Receive File: %s From Server Successful!\n", path);
			AfxMessageBox("接收成功！");
			flag = 0;
		}
		fclose(fp); //关闭文件
		closesocket(new_socket);
	}
	closesocket(listen_socket);
	WSACleanup();
}
void CMy111Dlg::OnChangeEdit1()
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);//将输入数据赋给文本框变量。
	UpdateData(FALSE);//将内容显示在文本框中
}