i make an autocad add on with dot net 3.50 and i reference to acdbmgd.dll,acmgd.dll from autocad 2012 what can I do to make it run on both autocad 2010 and autocad 2011 if i should reference to acdbmgd.dll,acmgd.dll from autocad 2010 where can i get this dll while i just have autocad 2012
I have had some success using 2008 libraries in AutoCAD 2010 so using the libraries from AutoCAD 2010 is probably your best bet, although not guaranteed to work. It will be depend on exactly what you are doing.
You can download the libraries as part of the ObjectARX 2010 package from Autodesk Developer Center (at the bottom of the page). You can also get ObjectARX 2011 from there if needed.