How to get current HDD type? - vb6

Question

I've found a way to get hdd serial no in vb6. But it needs to select an option from
primary master
primary slave
secondary master
secondary slave
But I want to auto select an option. The auto select logic is,
suppose I've 4 HDD with the above 4 types. And the logic will select the hdd type, on which the current system is loaded.
I really have no idea how to detect the current system is on which HDD type. Please help.
Here is the class that I use to select HDD serial no. HDSN CLASS

Answer 1

The code below should help:
Option Explicit
Private Const FILE_SHARE_READ = &H1
Private Const FILE_SHARE_WRITE = &H2
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000
Private Const OPEN_EXISTING = 3
Private Const IOCTL_VOLUME_BASE As Long = 86 ' Asc("V")
Private Const METHOD_BUFFERED As Long = 0
Private Const FILE_READ_ACCESS As Long = 1
Private Const FILE_ANY_ACCESS As Long = 0
'DEFINE IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS CTL_CODE(IOCTL_VOLUME_BASE, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)
Private Const IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS = (((IOCTL_VOLUME_BASE) * (2& ^ 16&)) Or ((FILE_ANY_ACCESS) * (2& ^ 14&)) Or ((0&) * (2& ^ 2&)) Or (METHOD_BUFFERED))
Private Type DISK_EXTENT
DiskNumber As Long
StartingOffset As Currency
ExtentLength As Currency
End Type
Private Type VOLUME_DISK_EXTENTS
NumberOfDiskExtents As Currency
Extents(1 To 4) As DISK_EXTENT
End Type
Private Declare Function CreateFile _
Lib "kernel32" Alias "CreateFileA" _
(ByVal lpFileName As String, _
ByVal dwDesiredAccess As Long, _
ByVal dwShareMode As Long, _
ByVal lpSecurityAttributes As Long, _
ByVal dwCreationDisposition As Long, _
ByVal dwFlagsAndAttributes As Long, _
ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle _
Lib "kernel32" _
(ByVal hObject As Long) As Long
Private Declare Function GetWindowsDirectory Lib "Kernel32.dll" Alias "GetWindowsDirectoryW" ( _
ByVal lpBuffer As Long, _
ByVal uSize As Long _
) As Long
Private Declare Function DeviceIoControlNoInput _
Lib "kernel32" Alias "DeviceIoControl" _
(ByVal hDevice As Long, _
ByVal dwIoControlCode As Long, _
ByVal lpInBuffer As Long, _
ByVal nInBufferSize As Long, _
ByRef lpOutBuffer As Any, _
ByVal nOutBufferSize As Long, _
ByRef lpBytesReturned As Long, _
ByVal lpOverlapped As Long) As Long
' Return the index of the physical drive from which we've booted into Windows.
Public Function GetBootPhysicalDrive() As Long
Dim sWindowsPath As String
Dim nRet As Long
Dim sDevicePath As String
Dim hLogicalBootDrive As Long
Dim sVolumeDevice As String
Dim uVolumeDiskExtents As VOLUME_DISK_EXTENTS
Dim nBytesReturned As Long
' Allocate space and retrieve the windows directory.
sWindowsPath = Space$(64)
nRet = GetWindowsDirectory(StrPtr(sWindowsPath), 64)
' This gives us the volume that Windows is on. Open it.
sVolumeDevice = "\\.\" & Left$(sWindowsPath, 2)
hLogicalBootDrive = CreateFile(sVolumeDevice, GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ + FILE_SHARE_WRITE, 0&, OPEN_EXISTING, 0&, 0&)
' Find out information about this volume.
nRet = DeviceIoControlNoInput(hLogicalBootDrive, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, 0&, 0&, uVolumeDiskExtents, LenB(uVolumeDiskExtents), nBytesReturned, 0&)
If nRet = 0 Then
' Something went wrong. Return error value.
GetBootPhysicalDrive = -1
Else
' This is the physical disk number.
GetBootPhysicalDrive = uVolumeDiskExtents.Extents(1).DiskNumber
End If
' Close volume.
CloseHandle hLogicalBootDrive
End Function

Answer 2

Using theAbove Solution of Mark Bertenshaw I wrote the following in a module and just called the GetDiskSerialNumber function to get serial of the HDD from which the current system is Booted. Here is my module code:
Option Explicit
Private Const FILE_SHARE_READ = &H1
Private Const FILE_SHARE_WRITE = &H2
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000
Private Const OPEN_EXISTING = 3
Private Const IOCTL_VOLUME_BASE As Long = 86 ' Asc("V")
Private Const METHOD_BUFFERED As Long = 0
Private Const FILE_READ_ACCESS As Long = 1
Private Const FILE_ANY_ACCESS As Long = 0
'DEFINE IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS CTL_CODE(IOCTL_VOLUME_BASE, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)
Private Const IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS = (((IOCTL_VOLUME_BASE) * (2& ^ 16&)) Or ((FILE_ANY_ACCESS) * (2& ^ 14&)) Or ((0&) * (2& ^ 2&)) Or (METHOD_BUFFERED))
Private Type DISK_EXTENT
DiskNumber As Long
StartingOffset As Currency
ExtentLength As Currency
End Type
Private Type VOLUME_DISK_EXTENTS
NumberOfDiskExtents As Currency
Extents(1 To 4) As DISK_EXTENT
End Type
Private Declare Function CreateFile _
Lib "kernel32" Alias "CreateFileA" _
(ByVal lpFileName As String, _
ByVal dwDesiredAccess As Long, _
ByVal dwShareMode As Long, _
ByVal lpSecurityAttributes As Long, _
ByVal dwCreationDisposition As Long, _
ByVal dwFlagsAndAttributes As Long, _
ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle _
Lib "kernel32" _
(ByVal hObject As Long) As Long
Private Declare Function GetWindowsDirectory Lib "Kernel32.dll" Alias "GetWindowsDirectoryW" ( _
ByVal lpBuffer As Long, _
ByVal uSize As Long _
) As Long
Private Declare Function DeviceIoControlNoInput _
Lib "kernel32" Alias "DeviceIoControl" _
(ByVal hDevice As Long, _
ByVal dwIoControlCode As Long, _
ByVal lpInBuffer As Long, _
ByVal nInBufferSize As Long, _
ByRef lpOutBuffer As Any, _
ByVal nOutBufferSize As Long, _
ByRef lpBytesReturned As Long, _
ByVal lpOverlapped As Long) As Long
' Return the index of the physical drive from which we've booted into Windows.
Public Function GetBootPhysicalDrive() As Long
Dim sWindowsPath As String
Dim nRet As Long
Dim sDevicePath As String
Dim hLogicalBootDrive As Long
Dim sVolumeDevice As String
Dim uVolumeDiskExtents As VOLUME_DISK_EXTENTS
Dim nBytesReturned As Long
' Allocate space and retrieve the windows directory.
sWindowsPath = Space$(64)
nRet = GetWindowsDirectory(StrPtr(sWindowsPath), 64)
' This gives us the volume that Windows is on. Open it.
sVolumeDevice = "\\.\" & Left$(sWindowsPath, 2)
hLogicalBootDrive = CreateFile(sVolumeDevice, GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ + FILE_SHARE_WRITE, 0&, OPEN_EXISTING, 0&, 0&)
' Find out information about this volume.
nRet = DeviceIoControlNoInput(hLogicalBootDrive, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, 0&, 0&, uVolumeDiskExtents, LenB(uVolumeDiskExtents), nBytesReturned, 0&)
If nRet = 0 Then
' Something went wrong. Return error value.
GetBootPhysicalDrive = -1
Else
' This is the physical disk number.
GetBootPhysicalDrive = uVolumeDiskExtents.Extents(1).DiskNumber
End If
' Close volume.
CloseHandle hLogicalBootDrive
End Function
Public Function GetDiskSerialNumber() As String
Dim wmiObject As Object
Dim obj As Object
Set wmiObject = GetObject("WinMgmts:")
For Each obj In wmiObject.InstancesOf("Win32_PhysicalMedia")
If obj.Tag = "\\.\PHYSICALDRIVE" + CStr(GetBootPhysicalDrive) Then GetDiskSerialNumber = obj.Tag + " : " + obj.SerialNumber
Next obj
End Function
Many thanks to Mark Bertenshaw.