Question about QProcess communication about stdout/stdin with MFC based dialogs!

Hi,

I use QProcess to start a simple MFC application (dialog based).
Now I want to communicate between QProcess and the MFC dialog about stdout/in.

It seems the stdout/in function is not supported basically in MFC apps. The MFC dialog uses a timer function for periodic writing to stdout like

fprintf(stdout, "hallo");
fflush(stdout);

But QProcess::readyReadStandardOutput() is never called.
I have also called setReadChannel() to StandartOutput.

I think the problem is on MFC dialogs side.
Have anybody an idea or solution how I can solve that?

Thanks.