in reply to
How to install pp, Wx module in 64 bit windows7 system
To build on one of the earlier posts, I recommend that you switch from using whatever Perl distribution you currently have to Strawberry Perl. That distribution is shipped with the same version of the compiler that was used to build Perl in the first place. There is a 64-bit version, which means that you will natively be using the correct environment whenever you need to install (and compile) something using CPAN simply by running perl -MCPAN -e "install My::Desired::Module"