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:
I've just published new versions of MapWinGIS: https://github.com/MapWindow/MapWinGIS/releases/tag/v5.1.0
Please use it and let us know if you find any bugs. Questions can be asked on our forum: https://mapwindow.discourse.group/c/mapwingis