Install Office 2013 32 & 64 bit


I have Office Plus 64 bit installed  in my machine, but i have an Access application only run´s in 32 bit. I can install both in same machine?

best regards
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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
yes, you can, they should be installed in different folders, and pls take note of this:

When you double-click an Access database file in Windows Explorer, or when you click an Access database file from the Recent Documents folder in Windows, the following rules apply:

If a version of Access is running, the Access database file opens in that version.

If no version of Access is running, the Access database file opens in the version of Access that you most recently installed on your computer or in the version of Access that you last used on your computer. Every time that you start Access, Access registers itself as the version to load the Access database file with.

Description of how to run multiple versions of Microsoft Access with Access 2003

BUT if you only have one ver of Access installed in your machine, there shouldn't have any issues shall arise.
Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
No you cannot.  32 and 64-bit additions of office cannot be mixed on the same machine. You either need to uninstall 64-bit office and install the 32 bit edition or provide your  user with a 64-bit version of your application.

Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
What about your application won't run in the 64-bit world? Might be easier to fix those, if possible, than try to dictate your user's environments.
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rflorencioAuthor Commented:

My application only run in 32 bit, is only to verify some code.

best regards
Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
Is this an application you created? If so, we might be able to help you modify it so that it will run under 64-bit as well.

If it's a commercial app, then of course you'd have to go back to the vendor.
Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
One way around this is to run it in a virtual machine.

rflorencioAuthor Commented:

Yes i have source code.

best regards
Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
Depending on what you have used in the app will determine how difficult it is to have a 32/64 bit version.

If you have not made API or DLL calls, then it is straight forward matter.  Simply run the app.

Note that if you distribute as a .accde at all, you will need two versions.   The reason for that is with an accde, the source code is removed, so it is not possible for VBA to re-compile on the fly.

If you have made Windows API or DLL calls, then all those calls must be appropriate for whatever mode office is running in (32 or 64 bit).

You can have one version of the app run in both environments (by using conditional compilation and compiler constants) or you might find it easier just to keep two different copies, one 32 bit and the other 64 bit.

Here's info on what you need to know about differences between 32 and 64 bits:

1. This will help you determine what might need to be changed:

Microsoft Office Code Compatibility Inspector user's guide

2. also read:

 Compatibility Between the 32-bit and 64-bit Versions of Office 2010

and the section "Introducing the VBA 7 Code Base" for the general overview.

3. All the new 64 bit calls are here:

4. A list of all the calls that were modified for 64 bit:

 Just keep in mind that if running in 32 bit mode, then Access will make all 32 bit calls.  All your API or DLL calls need to be 32 bit, ODBC driver calls would be 32 bit, etc.

  Likewise, if Office is running in 64 bit mode, then all calls made by Access will be 64 bit.

 Really the best solution if you have control over it is to avoid 64 bit Office.    There are only a few advantages to using it  (very large spreadsheets in Excel and large projects in Project) and quite a few disadvantages (lack of 3rd party add-ins, controls, drivers, and software in general).


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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
I should add that even Microsoft is still recommending that most users stick with 32 bit.  Also that just because you run a 64 bit OS does not mean that you need 64 bit Office.  

 32 bit Office works fine under any Windows 64 bit OS.

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