The typical product design of Dr. DWG Library is an Object oriented and class hierarchy is developed in Visual C++. Dr. DWG Library provides the custom library functions as Windows Dynamic Link Libraries (DLLs). This Library allows you to work in a single application irrespective of the AutoCAD? version of the drawings. Single set of APIs for all versions of AutoCAD DWG, BDXF and DXF formats is its specialty.