What ways of an insert 3d in already existing PDF document by means of.NET and C#?
In the reference there is only C/C ++.
I find only this
http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/wwhelp/w whimpl/common/html/wwhelp.htm?context=Acrobat9_HTMLHelp&file=Plugins_3 D_samples.48.1.html
What dll library need to connect to get access to CosObj.
You can access the Cos layer in a plugin for Acrobat. The plugin must be written in C/C++.