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DeviceIoControl($fh, FSCTL_GET_RETRIEVAL_POINTERS, ... my $error = Win32::GetLastError(); print "error-no: $error\n"; warn "DeviceIoControl->Call: ", Win32::FormatMessage($error) if ($er +ror);
DeviceIoControl($fh, FSCTL_GET_RETRIEVAL_POINTERS, ... $dwBytesReturned, [] ) or warn sprintf "DeviceIOControl failed with (%d) '%s'\n", $^E, $^E;