Does Visual Studio 2005 Team System support 64-bit Windows?
You can use Visual Studio 2005 to compile your application and specify that it should run on a 64-bit operating system either as a native application or under WOW64; however, Visual Studio 2005 itself (including Team Suite and the role-based editions) is a 32-bit application and when installed on a 64-bit Windows operating system will run under WOW64. Likewise, Team Foundation Build is a 32-bit application and when installed on a 64-bit Windows operating system will run under WOW64. For more information, see Visual Studio Development Environment 64–Bit Support and Visual Studio Team System 64-Bit Support.