This means that if a bit application makes a change to the redirected section of the registry, that change is also made to the 64 bit part of the registry, and vice-versa. Key reflection uses a policy of last writer wins. For example, if I install three applications with the same file extension then the last one to be installed will be associated with that extension. Install a bit application that associates itself with the file extension XYZ. Install the bit version of this application that associates itself with the file extension XYZ. Install another bit application that associates itself with the file extension XYZ. Double-clicking on a file with the extension XYZ in Explorer would load the application installed in step 3, as it was the last one to associate itself with this extension. All of this is done transparently for bit applications by WOW64, which, in intercepting calls to the operating system, detects references to file paths and registry keys and maps them accordingly. WOW64 has several limitations Some but not all bit features are available to bit applications WOW64 provides bit applications with access to some features of bit systems. For example, applications can have more memory up to 4GB with the correct setting..
Additional information Before we start discussing the topic of developing bit program code, let us speak about backward compatibility of bit Windows versions, with bit applications. Backward compatibility is arranged through the mechanisms implemented in WoW WoW64 Windows-on-Windows bit is a subsystem of Windows operating system, which allows you to execute bit applications on all the bit versions of Windows. The WoW64 subsystem does not support the following programs: Indirect expenses Different processor architectures have a bit different WoW
Not sure if your installed version of Windows is bit or bit? If you're running Windows XPchances are it's bit. However, if you're running Windows 10Windows 8Windows 7or Windows Vistathe chance that you're running a bit version goes up considerably.
One quick way to tell if you're running a bit or bit version of Windows is by looking at information about your operating system installation in Control Panel. Jul 29, - Get answers to some common questions about bit and bit versions of Windows.