>>In an effort to implement some sort of copy protection, I am currently registering the Computer Name
>>(using SYS(0) or GETENV() functions).. But that's kind of rudimentary. It can easily be changed.
>>
>>Is there a better way in VFP to retrieve some sort of Hardware or Windows Serial number?
>>I will even settle for Network WorkGroup, or anything else that's unique for a given computer.
>>
>>Thanks.
>
>
>Here is some code which I got from someone here on the UT which gets the hard disk serial number (the 3rd array item has the serial number):
>
>

>CLEAR
>?
>
>PUBLIC TARRAY
>DECLARE TARRAY(10)
>
>TARRAY = ""
>
>=GETVOLINFO( "c:\", @TARRAY )
>
>FOR I = 1 TO ALEN( TARRAY )
>  ? TARRAY(I)
>NEXT
>
>
>
>Function GetVolInfo
>
>Lparameters lcRoot, taInfo && Root of drive ie: "c:\", InfoArray passed by ref
>
>Declare SHORT GetVolumeInformation IN Win32API;
>  STRING @lpRootPathName, STRING @lpVolumeNameBuffer,;
>  INTEGER nVolumeNameSize, integer @lpVolumeSerialNumber,;
>  INTEGER @lpMaximumComponentLength, INTEGER @lpFileSystemFlags,;
>  STRING @lpFileSystemNameBuffer, INTEGER nFileSystemNameSize
>
>Store 0 TO lncomplen, lnsysflags, lnserialno
>Store SPACE(260) TO lcvolname, lcsysname
>Store LEN(lcvolname) TO lnvolsize, lnnamesize
>
>If (GetVolumeInformation(@lcRoot, @lcvolname,;
>    lnvolsize, @lnserialno, @lncomplen, @lnsysflags,;
>    @lcsysname, lnnamesize) # 0)
>
>  Dimension taInfo[3]
>
>  taInfo[1] = substr(lcvolname, 1, at(chr(0),lcvolname)-1) && Volume name
>  taInfo[2] = substr(lcsysname, 1, at(chr(0),lcsysname)-1) && Par.type
>  taInfo[3] = trans(right(trans(iif(lnSerialNo < 0, 0x7FFFFFFF-abs(lnSerialNo)+0x7FFFFFFF, lnSerialNo),'@0'),8) ) && Serial  
>
>Else
>
>  taInfo = ""
>
>Endif
>
>Return
>

The volume serial number can be changed easily right within windows. Better to get the physical serial number of the harddisk instead.