Problem:

Can Net Express run on a 64-bit operating system? Can 32-bit applications be built and still run on a 64-bit operating system?

Resolution:

When Net Express is installed, it automatically detects the bittage of the operating system. For instance: if the operating system is 64-bit, the 64-bit version of Net Express will be automatically selected and installed. There is no prompt or notification of this event. By default, 64-bit Net Express will still produce 32-bit run-times. If 64-bit run-times are desired, this setting can be changed in the Project Properties.

If Net Express is installed on a 32-bit operating system, the applications that get built can still run on a 64-bit operating system. Windows has always come with a component called WOW (Windows on Windows) emulation. It was originally used to allow 16-bit programs to run on 32-bit versions of Windows. WOW64 allows 32-bit applications to run on 64-bit Windows operating systems. This means that any 32-bit applications built in Net Express can still be run on 64-bit Windows.