ActiveX cad: dwg, dxf, plt, cgm, svg

CADEditorX is an ActiveX library for adding CAD features to applications in numerous environments such as .NET, HTML / JavaScript, VC++, Delphi etc. It enables viewing, editing, converting, measuring and printing DWG and other CAD files as well as 3D models and raster images. An easy-to-use API and numerous examples allow fast integration of CADEditorX to the final application. Supported Formats are DWG, DXF, DWF, HPGL, IGES, STEP, PDF.