问题
i have a 64-bit machine with 64-bit OS...
how can i compile programs with Visual Studio 2010 so that they work on 32-bit system
if i install 32-bit OS on my 64-bit machine than i thinks it won't be a problem
回答1:
If you are talking about .NET applications simply verify that you are targeting x86 in the properties of your project (this is the default setting) or Any CPU:
回答2:
This is a nice property of just-in-time compiled code. It runs just as well on a 32-bit machine (using the x86 jitter) as a 64-bit machine (x64 jitter). The only time you get in trouble is when you need to use legacy unmanaged code that's only available as 32-bit machine code. Not uncommon with old dbase providers (like Jet) and COM servers. You've got the right kind of machine to detect these problems early.
Emphasizing: you don't have a problem if the target machine is 32-bit, only if it is a 64-bit machine.
来源：https://stackoverflow.com/questions/5050695/compilation-on-64-bit-system-for-32-bit-system-compatibility