.NET

[#1]

Okay someone be a pal and remind me ... 

We're upgrading from Autocad 2011 32 bit Win XP

to Autocad 2011 64 bit Windows 7. 

What do I need to do with my .NET plugins which were done in Visual Studio 2008...

Or post the link to the web-site I need to read... 

Appreciate the help. 

[#2 · Accepted solution]

If you compiled them with "Any CPU" as the target platform, you probably won't have to do anything, unless you are PInvoking ARX functions which will have a different signature in 64 bit.

If you compiled them to x86 platform, you will need to recompile them (I suggest to Any CPU).

There are some cases where a referenced assembly may only work with 32 bit (like the Jet ODBC engine, I think).  This is probably the only thing that can prove to be a real problem, because in some cases there is no 64 bit version available.

[#3]

The other one is if you're working with tables. Can't recall exactly what it was but there is something where handling of object ID's within tables is different between 32- and 64-bit.