IDE Units and Logical Units

How can I discover which letter (logical unit, like C:, D:, etc) is IDE Primary Master, Primary Slave, etc. I already know how to use File System Object but I think it can't show me what I want. In addition, I would say that I have a routine that I can pass a number as a parameter which represents IDE sequence and it returns me all the information about the disk. Of course I know that I can have more than one partition in the same disk. The goal here is to associate the Hard Disk Serial Number with the logical unit from where the application has started. This is necessary because I have developered a mechanism associated with ActiveLock which returns a different System Code for each instalation and then the liberation key can be generated. The problem is, if a smart user knows how to use a tool like the Norton Ghost he can fool this mechanism. So, what I intend to do to avoid this is to save the the hd serial number from where the app has run for the first time (based in the logical drive letter) and then to compare against the hd serial number each time the app runs.  

Thanks in advance for any help
tomcruisewAsked:
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SpideyModCommented:
per recommendation

SpideyMod
Community Support Moderator @Experts Exchange
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aeklundCommented:
Private Declare Function GetVolumeInformation Lib "kernel32" Alias "GetVolumeInformationA" _
  (ByVal lpRootPathName As String _
  , ByVal lpVolumeNameBuffer As String _
  , ByVal nVolumeNameSize As Long _
  , lpVolumeSerialNumber As Long _
  , lpMaximumComponentLength As Long _
  , lpFileSystemFlags As Long _
  , ByVal lpFileSystemNameBuffer As String _
  , ByVal nFileSystemNameSize As Long) As Long

Private Sub Main()
  Dim sDriveLetter As String
  sDriveLetter = "C:\"
 
  Dim lError As Long
  Dim sName As String
  Dim lSize As Long
  Dim lSerNum As Long
  Dim lMaxLen As Long
  Dim lSysFlag As Long
  Dim sFileSys As String
  Dim lFileSys As Long
 
  lError = GetVolumeInformation(sDriveLetter, sName, lSize, lSerNum, lMaxLen, lSysFlag, sFileSys, lFileSys)
  MsgBox lSerNum
 
End Sub
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