sadly I don't think the answer changes :) See use/require, http://perl5.git.perl.org/perl.git/tree/HEAD:/ext/DynaLoader

after pod/README see http://perl5.git.perl.org/perl.git/blob/HEAD:/ext/DynaLoader/dl_win32.xs

dl_load_file does eventually LoadLibrary, but its a long path (lots of defines)

I've not seen a book/tutorial that covers everything you're looking for, but these links may help: Re: Using a shared object in perl, Manning: Extending and Embedding Perl jenness_ch02.pdf, XSLoader, DynaLoader

In reply to Re^2: internal about Dynaloader by Anonymous Monk
in thread guts of Dynaloader by xiaoyafeng

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