All: What I would like to accomplish: Interface my office management system to the 3CX PBX. For this I require: 1) Be notified of incoming call with caller ID. 2) Be able to make outbound calls From what I have gathered so far, I would follow the examples in "Connect Your Applications to 3CX with the CRM API for 3CXPhone", however that page states "Important: Development using 3CXPhone for Windows Plugin API requires 3CX Phone System PRO License.". We are a software house, not the end user, so I have worked under the impression that I could use the key provided that would activate the 3CX Phone System for Windows in 2 call mode, but I do not seem to find the same (wether download nor development key) for the PRO version. Guidance on where to look and what to request would be appreciated.