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.
With this app you can visualize, edit, analyse data, and compose printable maps
Knight Data Access Layer is the swiss army knife of Object Relational Mapping.
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