find_serial.vbs

Set WshShell = CreateObject("WScript.Shell")
MsgBox ConvertToKey(WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"))
Function ConvertToKey(Key)
	Const KeyOffset = 52
	i = 28
	Chars = "BCDFGHJKMPQRTVWXY2346789"
	Do
	Cur = 0
	x = 14
	Do
	Cur = Cur * 256
	Cur = Key(x + KeyOffset) + Cur
	Key(x + KeyOffset) = (Cur \ 24) And 255
	Cur = Cur Mod 24
	x = x -1
	Loop While x >= 0
		i = i -1
		KeyOutput = Mid(Chars, Cur + 1, 1) & KeyOutput
		If (((29 - i) Mod 6) = 0) And (i - 1) Then
			i = i -1
			KeyOutput = "-" & KeyOutput
		End If
	Loop While i >= 0
	ConvertToKey = KeyOutput
End Function