$hooker = $hook->Call($idHOOK, $lpfn, $hmod, $dwThreadId);

IIRC, $lpfn is supposed to be a reference to a subroutine so that it can be used as a callback.

In reply to Re^4: Win32 Keyboard hook in perl by Mr. Muskrat
in thread Win32 Keyboard hook in perl by xdeletex

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