I would like to recommend our products: AvisMap GIS Engine.
AvisMap GIS Engine is a comprehensive SDK designed to custom develop GIS solutions and applications. This SDK provides several ActiveX (OCX) controls which support Visual Basic, VB.NET, C#, Visual C++ and other ActiveX compatible programming languages, with Microsoft Visual Studio versions 6, 2003, 2005, and Express.
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Comprehensive SDK designed for custom GIS applications.......Only 199$