获取命令行程序的输出

SECURITY_ATTRIBUTES sa;
HANDLE hRead,hWrite;

sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL; //使用系统默认的安全描述符
sa.bInheritHandle = TRUE; //创建的进程继承句柄
if (!CreatePipe(&hRead,&hWrite,&sa,0)) //创建匿名管道
{
MessageBox("CreatePipe Failed!","提示",MB_OK | MB_ICONWARNING);
return;
}

STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory(&si,sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError = hWrite;
si.hStdOutput = hWrite;    //新创建进程的标准输出连在写管道一端
si.wShowWindow = SW_HIDE; //隐藏窗口
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

char cmdline[200];
CString tmp,stredit2;
GetDlgItemText(IDC_EDIT2,stredit2); //获取编辑框中输入的命令行
tmp.Format("cmd /C %s",stredit2);
sprintf(cmdline,"%s",tmp);
if (!CreateProcess(NULL,cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,π)) //创建子进程
{
MessageBox("CreateProcess Failed!","提示",MB_OK | MB_ICONWARNING);
return;
}
CloseHandle(hWrite); //关闭管道句柄

char buffer[4096] = {0};
CString strOutput;
DWORD bytesRead;

while (true)
{
if (ReadFile(hRead,buffer,4095,&bytesRead,NULL) == NULL) //读取管道
break;

strOutput += buffer;
SetDlgItemText(IDC_EDIT1,strOutput); //显示输出信息到编辑框,并刷新窗口
UpdateWindow();
Sleep(100);
}
CloseHandle(hRead);