MapWinGIS.ocx is a FREE and OPEN SOURCE C++ based geographic information system programming ActiveX Control and application programmer interface (API) that can be added to a Windows Form in Visual Basic, C#, Delphi, or other languages that support ActiveX, providing your app with a map. Go to our forum for questions and help:
Yet another release candidate has been published. https://github.com/MapWindow/MapWinGIS/releases
Please use it and report any bugs.