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I'm currently developing a solution that utilizes Open Design Alliance to read DWG files. I'm trying to implement a similar feature that exists in the AutoCad program itself -- AutoCad will notify the user if the file's origin is not from a licensed AutoCad application. (See Here)

I have explored the library in depth and have concluded that the information I need to determine this is most likely available but I'm having a hard time figuring out what the guidelines are that signify the file is from AutoCad origin, or not. Any Ideas?

Yep
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1 Answers1

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I don't know any existing guidelines, but if I would to do that, I would attach some XData (timestamp for example) to Modelspace or some dictionary each time user click Save. When drawing will be saved on other application there will be no such data, or data (timestamp) will be not corresponding to last save time of drawing.

CAD Developer
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