How can I use a single Visual Studio solution to build both x86 and x64 at the same time?

Question

I\'ve got an x86 Visual Studio solution with many project files in it. Some of the DLL files are designed to work as plug-ins to other applications on a user\'s system.

Answer 1

I ran into this problem with a project running in Visual Studio 2008 (on Windows XP) (32-bit) and also Visual Studio 2010 (on Windows 7) (64-bit).

The solution I used was to use the $(PROGRAMFILES) variable. It resolved correctly on both machines.