Firstly the BEGIN block is going to happen at compile-time so it's irrelevant that's it's in the function. If you want to include a module at run-time you could use the tried and tested eval() & use() 
sub routine {
  my $module = shift;
  my $routine = shift;
  my @params = @_;
  eval qq{ use "Foo::Bar::$module"; };
  no strict 'refs';
  return &{"Foo::Bar::$module::$routine"}(@params);
}

[download]
There's also the very handy autouse module which should do the magic for you 
sub routine {
  my $module = shift;
  my $routine = shift;
  my @params = @_;
  require autouse;
  autouse->import(
    "Foo::Bar::$module",
    "Foo::Bar::$module::$routine"
  );
  no strict 'refs';
  return &{"Foo::Bar::$module::$routine"}(@params);
}

[download]
I'm not sure if that's exactly how it should be used so checkout merlyn's Objects of runtime-determined classes for reference.
HTH

_________
broquaint

In reply to Re: Loading an unknown module by broquaint
in thread Loading an unknown module by Beatnik

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