this is my WOL routine (from a previous thread)

WOL.exe is located in %windir%
WOL requires the MAC address of the target PC

The only way of getting the MAC, is either have each PC log it to a central location or collect it from the DHCP server.

I use MS DHCP server and dhcpcmd.exe to retrieve the MAC address and populate an array (compname,macaddr)

code:
	$server = '192.168.1.2'

	$command = 'cmd /c %windir%\dhcpcmd.exe '+ $server +' getsuperscopetable | find "Subnet address"'
	$superscope = WSHPipe($command,1)

	for each $scope in $superscope
		$subnet = trim(split($scope,'=')[1])
		$command = 'cmd /c %windir%\dhcpcmd.exe '+ $server +' enumclients ' + $subnet+' -h'
		$output = WSHPipe($command,1)
		$x = 0
		For each $line in $output
			if val(left($line,1))
				$arr_IPaddr[$x]   = trim(substr($line,4,15))
				$arr_Computer[$x] = split(trim(substr($line,21,16)),'.')[0]
				$arr_MACaddr[$x]   = trim(substr($line,38,17))
				$x = $x +1
				redim preserve $arr_IPaddr[$x]
				redim preserve $arr_Computer[$x]
				redim preserve $arr_MACaddr[$x]
				endif
			next
		next
	for each $item in $ListViewEx1.items 
		if left($item.SubItems(3).Text,6) = 'Offlin' and $item.subitems(1).text = '¤'
			$Computer = $item.SubItems(2).Text
			$pos = ascan($arr_Computer,$computer)
			if $pos +1
				$mac = $arr_MACaddr[$pos]
				Status("Sending WOL to $computer")
				shell 'cmd /c %windir%\wol.exe ' + $mac +' > nul'
			else
				Status("MAC Addr Not available for $computer")
				endif
			endif
		next
	sleep 15
	endfunction
This is just the code from a current project (Remote Execution Manager), but if you try, you can figure out the details
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