PostMessage() across process boundaries equivalent

[Chicken Blood Machine]

Do you have a commercial license? If not don't bother reading the rest of my answer.

With the QtSingleApplication solution code, you can set up your different apps to be singletons (I'm not sure if this is appropriate for you). Then, to send a message, you can just execute the app using QProcess and a commandline that describes your new message. If the app is already running, then a message is just sent directly to the running app.

In fact, if you inspect the QtSingleApplication code carefully, you can probably change this to eliminate the singleton behaviour, but maintain the message passing behaviour.

[TheKedge]

Wow, nice hack . That sounds like it's worth playing with! I'll give it a try.

thanks
K

[wysota]

Or you can just use winapi to make your call and then catch it with platform events (winEvent or something like that -- never used it, so check the docs).

[Chicken Blood Machine]

Doesn't work very well on other platforms though.

[wysota]

Just like COM itself.

[Chicken Blood Machine]

Just like COM itself.

...which is why he said this:

eventually I'd like to remove the MS dependencies. and eventually would like to get away from COM altogether, I'll need to run on other operating systems. I think that'll be a challenge - I'll need to start learning CORBA ' stuff.

[wysota]

Yes, I missed that.

Anyway, things like shared memory or named pipes are always an alternative (yes, I know Qt doesn't have direct support for them).

BTW. Corba (and other RPCs) involve using network sockets, so with simple apps it might be simpler to just use network sockets yourself instead of higher level protocols.