It is not possible to mix and match 32- and 64-bit applications from the Microsoft Office suite.
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So, whether you as an Access developer like it or not, you might be confronted with the 64-bit edition of Microsoft Access because someone in your or your client’s organization decided they will install the Office Suite in 64-bit. financial risk calculations, you will probably benefit from the additional memory available to a 64-bit application. If you use Excel to calculate large data models, e.g. For Excel, there actually are use cases for the 64-bit edition. Unfortunately (in this regard) Access is part of the Office Suite as is Microsoft Excel. However, if you don’t want to use 64-bit Access, there is the /LARGEADDRESSWARE workaround to mitigate memory issues. So, the benefit of the 64-bit edition having more memory available can be significant if you encounter memory issues. The memory hunger of Access increased with each new version. This problem will not happen when you run the very same application in 64-bit Access. When you open multiple forms at the same time that contain a large number of sub-forms, most likely on a tab control, you might run into out-of-memory-errors on 32-bit systems. There is only one benefit of 64-bit Access I’m aware of. And finally, Access applications using the Windows API in their VBA code will require some migration work to function properly in an 圆4-environment.Only if you need to connect to some old legacy systems this might still be a factor. – Though this should rarely be an issue nowadays. Drivers/Connectors for external systems like ODBC-Databases and special hardware might not be available.(The Microsoft Common Controls are available for 64-bit since 2017, but there still is some confusion about using the MsComCtl.ocx in 64-bit Access.) Yes, this is still a problem in 2020, more than 10 years after the first 64-bit Windows operating system was released. Many ActiveX-Controls that are frequently used in Access development are still not available for 64-bit.There are several reasons not to use 64-bit Access. If you are just focusing on Microsoft Access, there is actually no compelling reason to use the 64-bit edition instead of the 32-bit edition. Windows 圆4 provides an excellent 32-bit subsystem that allows you to run any 32-bit application without drawbacks.įor now, 64-bit Office/Access still is rather the exception than the norm, but this is changing more and more. You do not need to install Office/Access as 64-bit application just because you got a 64-bit operating system.
Since Office 2010 all the Office applications including Microsoft Access and VBA are available in a 64-bit edition in addition to the classic 32-bit edition.
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How to convert Windows API declarations in VBA for 64-bitīy Philipp Stiefel, originally published