32-bit apps on 64-bit OS


#1

This may be silly questions, but since I don't know, therefore am asking that.

The questions is "Can 32-bit applications run/work on 64-bit OS?"


#2

In 64 bit Windows, you can...dunno about others...

64 bit Windows uses "WOW64" sub-system to do so


#3

From MSDN

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WOW64 is the x86 emulator that allows 32-bit Windows-based applications to run seamlessly on 64-bit Windows.

The system isolates 32-bit applications from 64-bit applications, which includes preventing file and registry collisions. Console, GUI, and service applications are supported. The system provides interoperability across the 32/64 boundary for scenarios such as cut and paste and COM. However, 32-bit processes cannot load 64-bit DLLs, and 64-bit processes cannot load 32-bit DLLs.