I need to convert an adress ip for create a reg binary key in the registry. These concern Alternative configuration IP. How can I do for ? If I have this information in my script : IP :192.168.20.0 Mask : 255.255.255.0 What function for convert these in a reg binary key or hexa. Thanks very much for yours solutions To resume how can i obtain the red value in the reg key, with IP and Mask. Dim $StrGUID, $Key $IP = ("192.168.100.0") $Mask = ("255.255.255.0") ;Read service name of the network card $Key = RegEnumKey("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\", 1) If @error <> 0 then ExitLoop $StrGUID = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\" & $Key, "ServiceName") ;Activate Alternate Configuration RegWrite("HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\" & $StrGUID, "ActiveConfigurations", "REG_MULTI_SZ", "Alternate_" & $StrGUID) ;Paramétrer Alternate Configuration avec Adresse IP et Masque ;Write the value"Options" sous HKLM\SYSTEM\CurrentControlSet\Services\Dhcp\Configurations RegWrite("HKLM\SYSTEM\CurrentControlSet\Services\Dhcp\Configurations\", "Options", "REG_BINARY", "32000000000000000400000000000000FFFFFF7FC0A800B701000000000000000400000000000000FFFFFF7FFFFFFF00") ;Write the key Alternate_{Valeur ServiceName} and the value "Options" under HKLM\SYSTEM\CurrentControlSet\Services\Dhcp\Configurations\ RegWrite("HKLM\SYSTEM\CurrentControlSet\Services\Dhcp\Configurations\Alternate_" & $StrGUID, "Options", "REG_BINARY", "32000000000000000400000000000000FFFFFF7FC0A800B701000000000000000400000000000000FFFFFF7FFFFFFF00") MsgBox(64, "Alternate Configuration", "Configuration alternative is OK with IP 192.168.100.0 and Mask 255.255.255.0")