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c++windowsinteractioncross-process

Cross-process interaction under C++

Please help, how can I organize the process-process data exchange (in Windows, if that matters)?

I have process1.exe which calls process2.exe with a few command line arguments. I want to track "progress" of process2 from process1 (say, some int value). It (that int value) can be accessed from process1 permanently or each X ms - doesn't matter.

Will be useful any solution: WinApi or Qt.

Thank you everybody! All answers are very useful! :) Many thanks!!

Solution

  • OTOH:

    • stdin/stdout redirection
    • Named pipe (CreateNamedPipe)
    • Anonymous pipe (CreatePipe)
    • Sockets (socket, connect, bind)
    • Shared memory (CreateFileMapping, MapViewOfFile)
    • Windows messages (e.g. WM_APP)

    Pick one - Windows messages or shared memory may be the easier ones.