use Encode;

print encode( 'UTF-16LE', $_ = "\\\\?\\C:\\some\\path", 1 );;
\ \ ? \ C : \ s o m e \ p a t h

$uPath = encode( 'UTF-16LE', $_ = "\\\\?\\C:\\some\\path", 1 );;

print unpack 'H*', $uPath;;
5c005c003f005c0043003a005c0073006f006d0065005c007000610074006800