call control api

3CX Call Control API on 3CX Phone System version 15

I revisited the 3CX Call Control API in one of my latest projects, this time on 3CX version 15.5. The last

Tektronix 1230 Logic Analyzer
Rebuilding the 1987 AdLib Music Synthesizer Card
Beware when using DES/TripleDES for data encryption
Capturing data from a Tektronix 1230 logic analyzer by emulating a parallel port printer
Accessing WIN32 API functions from C++ CLI