TakeCalls(Enabler[, port])

TakeCalls with it's first parameter set a non-zero value puts your aptilis program in listening mode. In this mode, other aptilis programs can use all the subs in your program thru the predefined sub 'Call()'. The programs calling yours may be on the same machine or on different ones across your network or across the Internet if you're connected to it.
From the moment it gets to 'TakeCalls() Your program can do nothing but reply to incoming calls. You can stop taking calls by invoking takeCalls() with a parameter of 0. But this can only be done in a sub, and in taking call mode, subs can only be run if they're called by a remote program. (Or called by a sub that has been called by a remote program, and so on).
In other words, only a call by different program may stop your program from taking calls.
The second optional parameter is the port you want your aptilis program to listen to. Usually this is set to 1108 by default, so you don't have to worry about it, but should you wish to change the default, it's possible. You may want to do so if you need several 'Listening' programs. Indeed, there can be only one program listening on any given port.

Return value:
0 or -1 in case of error, in which case the _errno variable will contain more details. Check Call for an example and the the Remote Sub Invocation topic for more details.