I already read all of the Q&A's and found no working answer.
I am unable to run your example project "zoiper_sdk" because of the missing dll ZoiperAPI.
We've purchased Zoiper 3 Biz, I have installed it and also registred the COM server with /regserver (CMS as Admin), but the dll is nowhere to find.
We are planning to integrate the Zoiper API with our CRM.
Please help :)