FFI::Library is a module with Perl Access to Dynamically Loaded Libraries.
$lib = FFI::Library->new("mylib");
$fn = $lib->function("fn", "signature");
$ret = $fn->(...);
This module provides access from Perl to functions exported from dynamically linked libraries. Functions are described by signatures, for details of which see the FFI module's documentation.
$clib_file = ($^O eq "MSWin32") ? "MSVCRT40.DLL" : "-lc";
$clib = FFI::Library->new($clib_file);
$strlen = $clib->function("strlen", "cIp");
$n = $strlen->($my_string);