How to communicate between two different exe

[high_flyer]

You could use sockets or pipes as well.

[gfunk]

I know about QTcpSocket, but does Qt have support for pipes? I'd prefer a cross-platform solution.

[elcuco]

tcp sockets then. the assistant works this way (there is an example or two in qt about this subject).

[Methedrine]

If both applications run on the same machine I'd recommend the shared memory solution. Alternately you could also use files, or the already mentioned sockets and pipes.