Detect USB Flsh Drive

Hi all,

While connecting a USB flash drive a command button wants to enable in the VB6 form. If any one have idea please let me know.....



Thanks....

Partha

What's the poll about?

http://www.experts-exchange.com/Prog..._21325034.html

This will tell you when a device has been removed (and safe to be removed) and will also tell you the name of a new device on arrival.

Place a listbox (Listbox1) on a form (Form1) and add this code:

Code:

---

'In a form
Option Explicit

Dim hDevNotify As Long

Private Sub Form_Load()
  Call DoRegisterDeviceInterface(Me.hWnd, hDevNotify)
  glngPrevWndProc = GetWindowLong(Me.hWnd, GWL_WNDPROC)
  SetWindowLong Me.hWnd, GWL_WNDPROC, AddressOf MyWindowProc
End Sub

Private Sub Form_Unload(Cancel As Integer)
    If hDevNotify <> 0 Then
        Call UnregisterDeviceNotification(hDevNotify)
    End If
  'pass control back to previous windows
  SetWindowLong Me.hWnd, GWL_WNDPROC, glngPrevWndProc
End Sub

---

Add a module with this code:

Code:

---

'In a module
Option Explicit

Public Type GUID
    Data1(1 To 4) As Byte
    Data2(1 To 2) As Byte
    Data3(1 To 2) As Byte
    Data4(1 To 8) As Byte
End Type

Public Type DEV_BROADCAST_DEVICEINTERFACE
  dbcc_size As Long
  dbcc_devicetype As Long
  dbcc_reserved As Long
  dbcc_classguid As GUID
  dbcc_name As Long
End Type

Public Type DEV_BROADCAST_DEVICEINTERFACE2
  dbcc_size As Long
  dbcc_devicetype As Long
  dbcc_reserved As Long
  dbcc_classguid As GUID
  dbcc_name As String * 1024
End Type

Public Declare Function RegisterDeviceNotification Lib "user32.dll" _
            Alias "RegisterDeviceNotificationA" ( _
            ByVal hRecipient As Long, _
            NotificationFilter As Any, _
            ByVal Flags As Long) As Long
           
Public Declare Function UnregisterDeviceNotification Lib "user32.dll" _
            (ByVal hRecipient As Long) As Long
           
Public Const DEVICE_NOTIFY_ALL_INTERFACE_CLASSES = &H4
Public Const DEVICE_NOTIFY_WINDOW_HANDLE = 0


 
Public Declare Sub CopyMemory Lib "kernel32" Alias _
    "RtlMoveMemory" (Destination As Any, Source As Any, _
    ByVal Length As Long)

Public Declare Function CallWindowProc Lib "user32" _
  Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, _
                          ByVal hWnd As Long, _
                          ByVal Msg As Long, _
                          ByVal wParam As Long, _
                          ByVal lParam As Long) As Long

Public Declare Function GetWindowLong Lib "user32" _
  Alias "GetWindowLongA" (ByVal hWnd As Long, _
                          ByVal nIndex As Long) As Long

Public Declare Function SetWindowLong Lib "user32" _
  Alias "SetWindowLongA" (ByVal hWnd As Long, _
                          ByVal nIndex As Long, _
                          ByVal dwNewLong As Long) As Long

Public Const GWL_WNDPROC = (-4)
Public Const WM_DEVICECHANGE = &H219
Public Const UNSAFE_REMOVE = &H1C

Public glngPrevWndProc As Long

Public Type DEV_BROADCAST_HDR
  dbch_size As Long
  dbch_devicetype As Long
  dbch_reserved As Long
End Type

Public Const DBT_CONFIGCHANGECANCELED As Long = 25
Public Const DBT_CONFIGCHANGED As Long = 24
Public Const DBT_CUSTOMEVENT As Long = 32744
Public Const DBT_DEVICEARRIVAL As Long = 32768
Public Const DBT_DEVICEQUERYREMOVE As Long = 32769
Public Const DBT_DEVICEQUERYREMOVEFAILED As Long = 32770
Public Const DBT_DEVICEREMOVECOMPLETE As Long = 32772
Public Const DBT_DEVICEREMOVEPENDING As Long = 32771
Public Const DBT_DEVICETYPESPECIFIC As Long = 32773
Public Const DBT_DEVNODES_CHANGED As Long = 7
Public Const DBT_QUERYCHANGECONFIG As Long = 23
Public Const DBT_USERDEFINED As Long = 65535

Public Const DBT_DEVTYP_OEM                As Long = 0
Public Const DBT_DEVTYP_DEVNODE            As Long = 1
Public Const DBT_DEVTYP_VOLUME              As Long = 2
Public Const DBT_DEVTYP_PORT                As Long = 3
Public Const DBT_DEVTYP_NET                As Long = 4
Public Const DBT_DEVTYP_DEVICEINTERFACE    As Long = 5
Public Const DBT_DEVTYP_HANDLE              As Long = 6

 
Public Function MyWindowProc(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

    Dim dbHdr As DEV_BROADCAST_HDR
   
    Dim dbDdb As DEV_BROADCAST_DEVICEINTERFACE2
   
    Select Case Msg
        Case WM_DEVICECHANGE
       
            Form1.List1.AddItem "WM_DEVICECHANGE " & Msg
 
            Select Case wParam
           
                Case DBT_CONFIGCHANGECANCELED
                    Form1.List1.AddItem "wParam = DBT_CONFIGCHANGECANCELED"
                   
                Case DBT_CONFIGCHANGED
                    Form1.List1.AddItem "wParam = DBT_CONFIGCHANGED"
                   
                Case DBT_CUSTOMEVENT
                    Form1.List1.AddItem "wParam = DBT_CUSTOMEVENT"
                   
                Case DBT_DEVICEARRIVAL
                    Form1.List1.AddItem "wParam = DBT_DEVICEARRIVAL"
                   
                    CopyMemory dbHdr, ByVal (lParam), Len(dbHdr)
               
                        Select Case dbHdr.dbch_devicetype
                            Case DBT_DEVTYP_OEM
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_OEM"
                               
                            Case DBT_DEVTYP_DEVNODE
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_DEVNODE"
                               
                            Case DBT_DEVTYP_VOLUME
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_VOLUME"
                               
                            Case DBT_DEVTYP_PORT
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_PORT"
                               
                            Case DBT_DEVTYP_NET
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_NET"
                               
                            Case DBT_DEVTYP_DEVICEINTERFACE
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_DEVICEINTERFACE"
                               
                                CopyMemory dbDdb, ByVal (lParam), ByVal (dbHdr.dbch_size)
                               
                                Form1.List1.AddItem "Device Name: " & Mid(dbDdb.dbcc_name, 1, InStr(dbDdb.dbcc_name, Chr(0)))
                           
                            Case DBT_DEVTYP_HANDLE
                                Form1.List1.AddItem "Device Type: DBT_DEVTYP_HANDLE"
                               
                            Case Else
                                Form1.List1.AddItem "Device Type unknown: " & CStr(dbHdr.dbch_devicetype)
                               
                        End Select
                       
               
                Case DBT_DEVICEQUERYREMOVE
                    Form1.List1.AddItem "wParam = DBT_DEVICEQUERYREMOVE"
                   
                Case DBT_DEVICEQUERYREMOVEFAILED
                    Form1.List1.AddItem "wParam = DBT_DEVICEQUERYREMOVEFAILED"
                   
                Case DBT_DEVICEREMOVECOMPLETE
                    Form1.List1.AddItem "wParam = DBT_DEVICEREMOVECOMPLETE"
                   
                Case DBT_DEVICEREMOVEPENDING
                    Form1.List1.AddItem "wParam = DBT_DEVICEREMOVEPENDING"
                   
                Case DBT_DEVICETYPESPECIFIC
                    Form1.List1.AddItem "wParam = DBT_DEVICETYPESPECIFIC"
                   
                Case DBT_DEVNODES_CHANGED
                    Form1.List1.AddItem "wParam = DBT_DEVNODES_CHANGED"
                   
                Case DBT_QUERYCHANGECONFIG
                    Form1.List1.AddItem "wParam = DBT_QUERYCHANGECONFIG"
                   
                Case DBT_USERDEFINED
                    Form1.List1.AddItem "wParam = DBT_USERDEFINED"
                   
                Case Else
                    Form1.List1.AddItem "wParam = unknown = " & wParam
           
            End Select
       
    End Select
 
 ' pass the rest messages onto VB's own Window Procedure
  MyWindowProc = CallWindowProc(glngPrevWndProc, hWnd, Msg, wParam, lParam)
End Function


Public Function DoRegisterDeviceInterface(hWnd As Long, ByRef hDevNotify As Long) As Boolean

    Dim NotificationFilter As DEV_BROADCAST_DEVICEINTERFACE
       
    NotificationFilter.dbcc_size = Len(NotificationFilter)
    NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE
   
    hDevNotify = RegisterDeviceNotification(hWnd, NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE Or DEVICE_NOTIFY_ALL_INTERFACE_CLASSES)
   
    If hDevNotify = 0 Then
        MsgBox "RegisterDeviceNotification failed: " & CStr(Err.LastDllError), vbOKOnly
        DoRegisterDeviceInterface = False
        Exit Function
    End If
   
    DoRegisterDeviceInterface = True
End Function

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BTW... This is my first post here so hi everyone :wave:

Hello pcuser,
I wonder how some people ask here in forums, get an excellent example as this that you posted and then go away without even say thanks.... :(
I really wanted to thank you for sharing this post as it really helped me right now
and has all the details I needed for my program.
This is my first post here and I just registered to thank you, and why not, will return here from time to time...
It looks a good vb resource here. Wish you all the best!