Static IP to DHCP via VB script.

'Changes Windows NT clients from using static IP address's to use DHCP.  Could be called from the logon script. Combined with the use of the SU utility this could be added to a logon script to perform a hands off migration.

'All variables declared
Option Explicit

Dim oWSHShell
Dim sNIC, sMan
Dim iCount

Set oWSHShell = Wscript.CreateObject("Wscript.Shell")

' Set the DCHP service to autostart
oWSHShell.RegWrite "HKLM\SYSTEM\CurrentControlSet\Services\DHCP\Start", 2

' Get Network card
On Error Resume Next
iCount = 1
Do 
  sNIC = oWSHShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\" & iCount & "\ServiceName")
  sMan = oWSHShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\" & iCount & "\Manufacturer")
  ' Skip the Async and NDIS services
  If sMan <> "Microsoft" And Err.Number = 0 Then
	Call SetNIC
  End If
  iCount = iCount + 1
Loop Until Err.Number <> 0

' Clear the error
Err.Clear

' End of Script



Sub SetNIC
  Dim iTest
  ' Set the NIC service to use DHCP
  sNIC = "HKLM\SYSTEM\CurrentControlSet\Services\" & sNIC &"\Parameters\TCPIP\"
  iTest = oWSHShell.RegRead(sNIC & "EnableDHCP")
  If iTest = 0 Then
	oWSHShell.RegWrite sNIC & "EnableDHCP", 1, "REG_DWORD"
	oWSHShell.RegWrite sNIC & "IPAddress", "0.0.0.0", "REG_MULTI_SZ"
	oWSHShell.RegWrite sNIC & "SubnetMask", "0.0.0.0", "REG_MULTI_SZ"
  End If
End Sub