x64 questions

I need to roll out a 64-bit SQL Server 2008 R2 box in the next couple of months.  And I have some questions that are really, really basic.

1.  I have ASP.NET apps (VS.NET 2008) that run on a (32-bit) Windows Server 2003 machine.  What changes will have to be made to these ASP.NET apps to allow them to write to my new box?

2.  I have third-party applications on (32-bit) Windows Server 2003 boxes that employ ODBC DSNs to write to SQL.  What will I need to do in order to make this work with a new DSN that points to my 64-bit SQL box?

I ask these goofy questions because, to me, nothing *should* have to be done.  For instance, I get that if my app is 64-bit, it would need to use a DSN in the 64-bit ODBC admin.  But it's only the target database that's going 64-bit.  But I'm sure I'm totally wrong.

Thanks for your help.
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Carlos VillegasFull Stack .NET DeveloperCommented:
I you are right, you need to do nothing, the 32 bit SQL Server client will work with your SQL Server 64bit instance.
Just if the application doesn't work, try to build it on 64-bit machine. It should work.
bamapieAuthor Commented:
So, the answer to both of my questions is "nothing needs to be done"?
Carlos VillegasFull Stack .NET DeveloperCommented:
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