Option Explicit
 
'Modulo: FlashSerial
'Autor: Sergio Desanti (Hasseds)
'Agradecimientos: Seba, Cobein, A.Desanti
'Test: XP (32 BIT) & W7 (32 BIT)
'Retorno:  Letra de unidad y Serial Number(ESN) de Pen Drive conectados
'
Declare Function GetLogicalDriveStrings Lib "kernel32" Alias "GetLogicalDriveStringsA" (ByVal nBufferLength As Long, ByVal lpBuffer As String) As Long
Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, lpSecurityAttributes As Any, 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 DeviceIoControl Lib "kernel32" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, lpInBuffer As Any, ByVal nInBufferSize As Long, lpOutBuffer As Any, ByVal nOutBufferSize As Long, lpBytesReturned As Long, ByVal lpOverlapped As Long) As Long
 
Private Declare Function IIDFromString Lib "ole32" (ByVal lpsz As Long, ByRef lpiid As GUID) As Long
 
Private Declare Function SetupDiGetClassDevs Lib "setupapi.dll" Alias "SetupDiGetClassDevsA" (ByRef ClassGuid As GUID, ByVal Enumerator As Long, ByVal hwndParent As Long, ByVal flags As Long) As Long
Private Declare Function SetupDiEnumDeviceInterfaces Lib "setupapi.dll" (ByVal DeviceInfoSet As Long, ByVal DeviceInfoData As Long, ByRef InterfaceClassGuid As GUID, ByVal MemberIndex As Long, ByRef DeviceInterfaceData As SP_DEVICE_INTERFACE_DATA) As Long
Private Declare Function SetupDiGetDeviceInterfaceDetail Lib "setupapi.dll" Alias "SetupDiGetDeviceInterfaceDetailA" (ByVal DeviceInfoSet As Long, ByRef DeviceInterfaceData As SP_DEVICE_INTERFACE_DATA, DeviceInterfaceDetailData As Any, ByVal DeviceInterfaceDetailDataSize As Long, ByRef RequiredSize As Long, DeviceInfoData As Any) As Long
Private Declare Function SetupDiDestroyDeviceInfoList Lib "setupapi.dll" (ByVal DeviceInfoSet As Long) As Long
 
Private Type STORAGE_DEVICE_NUMBER
    DeviceType As Long: DiskNumber As Long: PartNumber As Long
End Type
 
Private Type GUID
    Data1 As Long: Data2 As Integer: Data3 As Integer: Data4(7) As Byte
End Type
 
Private Type SP_DEVICE_INTERFACE_DATA
    cbSize As Long: InterfaceClassGuid As GUID: flags As Long: Reserved As Long
End Type
 
Private Type SP_DEVICE_INTERFACE_DETAIL_DATA
    cbSize As Long: strDevicePath As String * 260
End Type
 
Public Function FlashSerial(ByVal sLetra As String) As String
 
  sLetra = Left$(UCase$(sLetra), 1) & ":"
 
  FlashSerial = sLetra & " NO USB"
 
  Dim RetDeviceIndex    As Long
  RetDeviceIndex = DeviceIndex(sLetra)
  If RetDeviceIndex < 0 Then Exit Function ' " -1 -2 -3 en DeviceIndex"
  
  Dim TGUID             As GUID
  Call IIDFromString(StrPtr("{53f56307-b6bf-11d0-94f2-00a0c91efb8b}"), TGUID)
 
  Dim hDev              As Long
  hDev = SetupDiGetClassDevs(TGUID, &H0, &H0, &H12)
  If hDev = -1 Then: Exit Function
 
  Dim lCount            As Long
  Dim lSize             As Long
  Dim DTA               As SP_DEVICE_INTERFACE_DATA
  Dim DTL               As SP_DEVICE_INTERFACE_DETAIL_DATA
 
  DTA.cbSize = Len(DTA)
  DTL.cbSize = &H5
 
  Do While Not (SetupDiEnumDeviceInterfaces(hDev, &H0, TGUID, lCount, DTA) = &H0&)
    Call SetupDiGetDeviceInterfaceDetail(hDev, DTA, ByVal &H0&, &H0, lSize, ByVal &H0&)
    Call SetupDiGetDeviceInterfaceDetail(hDev, DTA, DTL, ByVal lSize, &H0&, ByVal &H0&)
    If InStr(UCase$(DTL.strDevicePath), "USB") Then
      If DeviceIndex(DTL.strDevicePath, True) = RetDeviceIndex Then
        If UBound(Split(DTL.strDevicePath, "#")) > 1 Then
          FlashSerial = sLetra & Split(UCase$(DTL.strDevicePath), "#")(2)
          Exit Do
        End If
      End If
    End If
    lCount = lCount + 1
  Loop
 
  Call SetupDiDestroyDeviceInfoList(hDev)
 
End Function
 
Public Function DeviceIndex(ByVal sLetra As String, Optional strDevicePath As Boolean) As Long
 
  Dim hdh As Long, br As Long, SDN As STORAGE_DEVICE_NUMBER
 
  If Not strDevicePath Then sLetra = "\\.\" & Left$(UCase$(sLetra), 1) & ":"
 
  hdh = CreateFile(sLetra, &H0&, &H3&, ByVal &H0&, &H3&, &H0&, &H0&) ': MsgBox hdh, , "hdh"
  If Not (hdh = -1) Then
      If DeviceIoControl(hdh, &H2D1080, &H0&, &H0&, SDN, Len(SDN), br, ByVal &H0&) Then
          If SDN.DeviceType = 7 Then
              DeviceIndex = SDN.DiskNumber  ' Retorno DeviceIndex
          Else
              DeviceIndex = -3   ' No es GUID 53f56307-b6bf-11d0-94f2-00a0c91efb8b
          End If
      Else
          DeviceIndex = -2  ' Floppy o DeviceIoControl = 0 (GetLastError)
      End If
      Call CloseHandle(hdh)
  Else
      DeviceIndex = -1  ' Unidad sin dispositivo o CreateFile = -1 (GetLastError)
  End If
 
End Function
 
 
 

 
Option Explicit
 
Private Sub Form_Load()
 
      MsgBox FlashSerial("f")
 
End Sub