how to deal with dwg file

Question

I want to use code to analyze dwg file. Any one know any SDK tools to start with?

Answer 1

From Wikipedia:

Autodesk sells a read/write library, called RealDWG, under selective licensing terms for use in non-competitive applications. Several companies have attempted to reverse engineer Autodesk's DWG format, and offer software libraries to read and write Autodesk DWG files. The most successful is Open Design Alliance, a non-profit consortium created in 1998 by a number of software developers (including competitors to Autodesk), released a read/write/view library called the OpenDWG Toolkit, which was based on the MarComp AUTODIRECT libraries. ODA has since rewritten and updated that code.

Answer 2

WoutWare's cadlib supports WinForms embedding and a few other things.