Windows NT.

List of adapters and their MAC address:

The adapters are located at the following registry string:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\

They are at the folders with the values 0001, 0002, 0003…

The key “NetworkAddress” is the MAC address assigned, if this key doesn’t exist, The MAC address is the one assigned by default.

The value of “NetCfgInstanceId” relates the adapter with the registry key at the string:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Tcpip\Parameters\Interfaces\

At this string you can find all the information available for each adapter.

If “RegistrationEnabled” exists and its value is 1, The adapter can be shown as a valid net adapter.

The adapter’s configuration values are found at the following keys:

IP address:

It’s found at the key:
“IPAddress”

Network mask:

It’s found at the key:
“SubnetMask”

Gateway:

It’s found at the key:
“DefaultGateway”

DHCP status:

It’s found at the key:
“EnableDHCP”

DNS:

“NameServer”

You can use MacIP Change totally free.

Windows 98.

List of adapters and their MAC address:

The adapters are located at the following registry string:

HKEY_LOCAL_MACHINE\System\
CurrentControlSet\Services\Class\Net\

They are at the folders with the values 0001, 0002, 0003…

The key “NetworkAddress” is the MAC address assigned, if this key doesn’t exist, The MAC address is the one assigned by default.

At this string you can find all the information available for each adapter:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\Class\NetTrans\

The adapter’s configuration values are found at the following keys:

IP address:

It’s found at the key:
“IPAddress”

Network mask:

It’s found at the key:
“IPMask”

Gateway:

It’s found at the key:
“DefaultGateway”

DHCP Status:

It’s found at the key:
“EnableDHCP”

DNS:

HKEY_LOCAL_MACHINE\System\
CurrentControlSet\Services\VxD\MSTCP\

You can use MacIP Change totally free.