管道Demo

使用管道实现读取DOS命令结果，界面如下：
主要代码如下：
 1     UpdateData(TRUE);
 2 
 3     //创建一个管道，用于接收命令执行结果
 4     SECURITY_ATTRIBUTES sa;
 5     ZeroMemory(&sa, sizeof(sa));
 6     sa.nLength = sizeof(SECURITY_ATTRIBUTES);
 7     sa.bInheritHandle = TRUE;
 8     sa.lpSecurityDescriptor = NULL;
 9     HANDLE hRead, hWrite;
10     if (!CreatePipe(&hRead, &hWrite, &sa, 0))
11     {
12         AfxMessageBox(_T("创建管道出错。"));
13         return;
14     }
15 
16     //创建一个没有DOS命令框的、隐藏窗口的进程来执行用户输入的命令
17     STARTUPINFO si;
18     ZeroMemory(&si, sizeof(si));
19     si.cb = sizeof(STARTUPINFO);
20     GetStartupInfo(&si);
21     si.hStdError = hWrite;
22     si.hStdOutput = hWrite;
23     si.wShowWindow = SW_HIDE;
24     si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
25 
26     PROCESS_INFORMATION pi;
27     CString strCommand;
28     strCommand.Format(_T("cmd.exe /c %s"), m_strCommand);
29     BOOL res = CreateProcess(NULL, strCommand.GetBuffer(0), NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi);
30     if (!res)
31     {
32         AfxMessageBox(_T("创建进程出错。"));
33         return;
34     }
35     CloseHandle(hWrite);
36 
37     //从管道中读取已写入的数据，并显示出来
38     CString strTemp;
39     TCHAR szBuff[4096] = { 0 };
40     DWORD dwRead = 0;
41     m_strResult = _T("");
42     while (true)
43     {
44         if (!ReadFile(hRead, szBuff, 4095, &dwRead, NULL))
45         {
46             break;
47         }
48         szBuff[dwRead] = _T('\0');
49         strTemp.Format(_T("%s"), szBuff);
50         m_strResult += strTemp;
51     }
52     UpdateData(FALSE);
下载地址：http://pan.baidu.com/s/1gdIEoJT