Open and edit DWG file without AutoCAD

I am trying to open a DWG file in VB.NET forms withou开发者_运维知识库t opening AutoCAD. However, a problem occurs:

The specified module could not be found. (Exception from HRESULT: 0x8007007E)

I also want to edit the image in the DWG file, i.e. most probably a factory layout, and store information about the object used in the layout to figure out the best possible way to reach from source to destination.

This factory layout map is input for a robot which will move according the path available.

Can anybody help? How should I proceed?

Use Teigha or a special program (I don't remember the name) from AutoCad developers to open a dwg file.