有四种方法1.剪贴板 a.创建个ClipBoard的对话框应用程序，加两EditBox和两个Button发送接收。 b.具体代码： 发送端代码：if(OpenClipboard()){ CString str; HANDLE hClip; char *pBuf; EmptyClipboard(); GetDlgItemText(IDC_EDIT_SEND,str); hClip=GlobalAlloc(GMEM_MOVEABLE,str.GetLength()+1); pBuf=(char*)GlobalLock(hClip);将句柄转换为指针！ strcpy(pBuf,str); GlobalUnlock(hClip); SetClipboardData(CF_TEXT,hClip); CloseClipboard();} 接收端代码：if(OpenClipboard()){ if(IsClipboardFormatAvailable(CF_TEXT)) { HANDLE hClip; char *pBuf; hClip=GetClipboardData(CF_TEXT); pBuf=(char*)GlobalLock(hClip); GlobalUnlock(hClip); SetDlgItemText(IDC_EDIT_RECV,pBuf); CloseClipboard(); }}2.匿名管道：只能在父子进程之间进行通信 a.先建一个Parent的单文档应用程序，增加“创建管道”“读取数据”“写入数据”三个菜单 b.增加成员变量HANDLE类型的hRead,hWrite，初始化变量，并在析构函数中释放句柄 c.响应菜单代码：void CParentView::OnPipeCreate() 菜单“创建管道”代码{// TOD Add your command handler code hereSECURITY_ATTRIBUTES sa;sa.bInheritHandle=TRUE;sa.lpSecurityDescriptor=NULL;sa.nLength=sizeof(SECURITY_ATTRIBUTES);if(!CreatePipe(&hRead,&hWrite,&sa,0)){ MessageBox("创建匿名管道失败！"); return;}STARTUPINFO sui;PROCESS_INFORMATION pi;ZeroMemory(&sui,sizeof(STARTUPINFO));将数据清0！sui.cb=sizeof(STARTUPINFO);sui.dwFlags=STARTF_USESTDHANDLES;sui.hStdInput=hRead;sui.hStdOutput=hWrite;sui.hStdError=GetStdHandle(STD_ERROR_HANDLE);if(!CreateProcess("..\\Child\\Debug\\Child.exe",NULL,NULL,NULL, TRUE,0,NULL,NULL,&sui,&pi))创建子进程{ CloseHandle(hRead); CloseHandle(hWrite);关闭句柄，将内核对象的使用计数减少1，这样当操作系统发现内核对象的使用计数为0时，将清除内核对象。 hRead=NULL; hWrite=NULL; MessageBox("创建子进程失败！"); return;}else{ CloseHandle(pi.hProcess); CloseHandle(pi.hThread);}} void CParentView::OnPipeRead() 菜单“读取数据”代码{// TOD Add your command handler code herechar buf[100];DWORD dwRead;if(!ReadFile(hRead,buf,100,&dwRead,NULL)){ MessageBox("读取数据失败！"); return;}MessageBox(buf);} void CParentView::OnPipeWrite() 菜单“写入数据”代码{// TOD Add your command handler code herechar buf[]="http://www.sunxin.org";DWORD dwWrite;if(!WriteFile(hWrite,buf,strlen(buf)+1,&dwWrite,NULL)){ MessageBox("写入数据失败！"); return;}} d.再建一个Child的单文档，在View中增加两个成员hRead和hWrite.在OnInitialUpdate()中得到句柄的值。void CChildView::OnInitialUpdate() {CView::OnInitialUpdate();// TOD Add your specialized code here and/or call the base classhRead=GetStdHandle(STD_INPUT_HANDLE);注意这句代码！hWrite=GetStdHandle(STD_OUTPUT_HANDLE);} e.加菜单“读取数据”“写入数据”其代码如下：void CChildView::OnPipeRead() {// TOD Add your command handler code herechar buf[100];DWORD dwRead;if(!ReadFile(hRead,buf,100,&dwRead,NULL)){ MessageBox("读取数据失败！"); return;}MessageBox(buf);} void CChildView::OnPipeWrite() {// TOD Add your command handler code herechar buf[]="匿名管道测试程序";DWORD dwWrite;if(!WriteFile(hWrite,buf,strlen(buf)+1,&dwWrite,NULL)){ MessageBox("写入数据失败！"); return;}} 3.命名管道：还可以跨网络通信，服务器只能在win2000和NT下运行！而客户端可以在95下运行。关键函数CreateNamedPipe a.先建一个NamedPipeSRV单文档应用程序，加菜单“创建管道”“读取数据”“写入数据” b.在View中增加Handle变量hPipe，注意在析构函数中释放它！ c.响应菜单，创建命名管道void CNamedPipeSrvView::OnPipeCreate() {// TOD Add your command handler code herehPipe=CreateNamedPipe("\\\\.\\pipe\\MyPipe", PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, 0,1,1024,1024,0,NULL);if(INVALID_HANDLE_VALUE==hPipe){ MessageBox("创建命名管道失败！"); hPipe=NULL; return;}HANDLE hEvent;hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);if(!hEvent){ MessageBox("创建事件对象失败！"); CloseHandle(hPipe); hPipe=NULL; return;}OVERLAPPED ovlap;ZeroMemory(&ovlap,sizeof(OVERLAPPED));ovlap.hEvent=hEvent;if(!ConnectNamedPipe(hPipe,&ovlap)){ if(ERROR_IO_PENDING!=GetLastError()) { MessageBox("等待客户端连接失败！"); CloseHandle(hPipe); CloseHandle(hEvent); hPipe=NULL; return; }}if(WAIT_FAILED==WaitForSingleObject(hEvent,INFINITE)){ MessageBox("等待对象失败！"); CloseHandle(hPipe); CloseHandle(hEvent); hPipe=NULL; return;}CloseHandle(hEvent);} void CNamedPipeSrvView::OnPipeRead() {// TOD Add your command handler code herechar buf[100];DWORD dwRead;if(!ReadFile(hPipe,buf,100,&dwRead,NULL)){ MessageBox("读取数据失败！"); return;}MessageBox(buf);} void CNamedPipeSrvView::OnPipeWrite() {// TOD Add your command handler code herechar buf[]="http://www.sunxin.org";DWORD dwWrite;if(!WriteFile(hPipe,buf,strlen(buf)+1,&dwWrite,NULL)){ MessageBox("写入数据失败！"); return;}} d.再建一个NamedPipeCLT单文档工程，加菜单“连接管道”“读取数据”“写入数据”，当然别忘记成员变量hPipe的定义和初始化 e.响应菜单代码void CNamedPipeCltView::OnPipeConnect() 连接管道{// TOD Add your command handler code hereif(!WaitNamedPipe("\\\\.\\pipe\\MyPipe",NMPWAIT_WAIT_FOREVER)){ MessageBox("当前没有可利用的命名管道实例！"); return;}hPipe=CreateFile("\\\\.\\pipe\\MyPipe",GENERIC_READ | GENERIC_WRITE, 0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);if(INVALID_HANDLE_VALUE==hPipe){ MessageBox("打开命名管道失败！"); hPipe=NULL; return;}} void CNamedPipeCltView::OnPipeRead() 读取数据{// TOD Add your command handler code herechar buf[100];DWORD dwRead;if(!ReadFile(hPipe,buf,100,&dwRead,NULL)){ MessageBox("读取数据失败！"); return;}MessageBox(buf);} void CNamedPipeCltView::OnPipeWrite() 写入数据{// TOD Add your command handler code herechar buf[]="命名管道测试程序";DWORD dwWrite;if(!WriteFile(hPipe,buf,strlen(buf)+1,&dwWrite,NULL)){ MessageBox("写入数据失败！"); return;}} 4.邮槽，使用时应将消息长度限制在424字节以下，关键函数CreateMailSlot() a.先建一个MailSlotSRV工程，加菜单“接收数据” b.消息响应代码：void CMailslotSrvView::OnMailslotRecv() 菜单“接收数据”的代码{// TOD Add your command handler code hereHANDLE hMailslot;hMailslot=CreateMailslot("\\\\.\\mailslot\\MyMailslot",0, MAILSLOT_WAIT_FOREVER,NULL);if(INVALID_HANDLE_VALUE==hMailslot){ MessageBox("创建油槽失败！"); return;}char buf[100];DWORD dwRead;if(!ReadFile(hMailslot,buf,100,&dwRead,NULL)){ MessageBox("读取数据失败！"); CloseHandle(hMailslot); return;}MessageBox(buf);CloseHandle(hMailslot);} c.加工程MailSlotCLT,加菜单“发送数据” d.加消息响应，添加代码，客户端也比较简单。void CMailslotCltView::OnMailslotSend() 菜单“发送数据”的代码{// TOD Add your command handler code hereHANDLE hMailslot;hMailslot=CreateFile("\\\\.\\mailslot\\MyMailslot",GENERIC_WRITE, FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);if(INVALID_HANDLE_VALUE==hMailslot){ MessageBox("打开油槽失败！"); return;}char buf[]="http://www.sunxin.org";DWORD dwWrite;if(!WriteFile(hMailslot,buf,strlen(buf)+1,&dwWrite,NULL)){ MessageBox("写入数据失败！"); CloseHandle(hMailslot); return;}CloseHandle(hMailslot);} 5.以上4种方法各有优缺点：剪贴板比较简单。邮槽是基于广播的，可以一对多发送。但只能一个发送，一个接收，要想同时发送接收，须写两次代码。命名管道和邮槽可以进行网络通信。
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