win32 api for Process.BeginOutputReadLine

Question

hi, i wanted to know the c++ equivalent of c#'s Process.BeginOutputReadLine, where i aynchronously read from the standardoutput of another process. Is there any API for it?

Answer 1

To read the standard output of a process you need to assign an appropriate handle to an instance of STARTUPINFO passed to CreateProcess. Remember to include the STARTF_USESTDHANDLES flag.

Usually an anonymous pipe is used, created via CreatePipe.

See "Creating a Child Process with Redirected Input and Output" for an example.

You can use the normal Win32 approaches (OVERLAPPED + event, IOCompleteion Port,...) to reading the output handle asynchronously.