C++中执行windows指令

BOOL ExecDosCmd(char cmd[1024])
{
SECURITY_ATTRIBUTES sa;
HANDLE hRead,hWrite;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
if (!CreatePipe(&hRead,&hWrite,&sa,0))
{
return FALSE;
}
char command[1024];//长达1K的命令行，够用了吧
strcpy(command,"Cmd.exe /C ");
strcat(command,cmd);
STARTUPINFO si;
PROCESS_INFORMATION pi;
si.cb = sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError = hWrite;//把创建进程的标准错误输出重定向到管道输入
si.hStdOutput = hWrite;//把创建进程的标准输出重定向到管道输入
si.wShowWindow = SW_HIDE;
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
//关键步骤，CreateProcess函数参数意义请查阅MSDN
if (!CreateProcess(NULL, command,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi))
{
CloseHandle(hWrite);
CloseHandle(hRead);
return FALSE;
}
CloseHandle(hWrite);
char buffer[4096] = {0};//用4K的空间来存储输出的内容，只要不是显示文件内容，一般情况下是够用了。
DWORD bytesRead;
while (true)
{
if (ReadFile(hRead,buffer,4095,&bytesRead,NULL) == NULL)
break;
//buffer中就是执行的结果，可以保存到文本，也可以直接输出
//    MessageBox(NULL, buffer, TEXT("结果"), MB_OK);
}
CloseHandle(hRead);
return TRUE;
}