in reply to perl510.lib needed to compile C++ code

You got more problems than just a missing .lib file. Perl 5.10 is out of support since 2009-08-23. Visual Studio 2008 is out of support since 2018-04-10. Both programs had, in newer version, major security updates since then.

That pretty much guarantees that both your development environment and any software you make with your tools will have major security problems.

I think it is time to upgrade.

perl -e 'use Crypt::Digest::SHA256 qw[sha256_hex]; print substr(sha256_hex("the Answer To Life, The Universe And Everything"), 6, 2), "\n";'

In Section Seekers of Perl Wisdom