Hello

when you run multiple instance of Skype, you must run them as different users I suppose. How can I find the different instances running through the API.
sendmessage(HWND_BROADCAST, works only for the current user?

Thank you

I'd like to know how an application can communicate with two or more running skype instances.

In addition, an application does not get a reply from a skype instance that is running under another Windows user. How does the application run as windows user A communicate with skype instance run as windows user B? Thanks.

Probably you have to run another instance of your application under the same user you're running another Skype instance. Then someway connect different instances of your program. or make a kind of daemon.

If your application was designed as a system service, assuming we are speaking about Windows, it could communicate will all running Skype clients.