>>Hi,
>> Can anyone give me some idea or API name to get the serial number of the ethernet card installed on a CPU. How can we call a function of an API? I am working on vfp 7.
>> Thanks in advance,
>>
>>Regards/ Somesh
>
>One of the ways:
>

>Declare Integer CoCreateGuid In 'OLE32.dll' ;
>	string @pguid
>Declare Integer StringFromGUID2 In 'OLE32.dll' ;
>	string rguid, String @lpsz, Integer cchMax
>Declare Integer UuidCreateSequential In 'RPCRT4.dll'  String @ Uuid
>
>pGUID=Replicate(Chr(0),16)
>rGUID=Replicate(Chr(0),80)
>lcOldError = On('error')
>On Error lnResult = CoCreateGuid(@pGUID)
>lnResult = UuidCreateSequential(@pGUID)
>On Error &lcOldError
>lcMacAddress = Substr( Iif( lnResult = 0 And ;
>	StringFromGUID2(pGUID,@rGUID,40) # 0, ;
>	StrConv(Left(rGUID,76),6), "" ), 26,12)
>
>? m.lcMacAddress
>

Cetin

Dear Cetin,
I read that "a GUID, or globally unique identifier, is a number that Microsoft guarantees is unique throughout the entire world".
I want to know can i use from this unique identifier for making a software LOCK?
Is it possible that this value changed if user change it's Hardware or it's OS ( such as upgrade WIN98 to WIN XP? ) or any change in it's computer?
This GUID generate based on what? hardware? or anything
Thanks for your guide