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.

 You can download the software here for free!

http://www.avismap.com/download/index.html