APIs: Trouver le nom de la classe Windows d'une application en cours	Author(s) Dev Ashish

(Q)    Comment retrouver le nom de la classe Windows d'une application déjà en cours d'exécution?
(A)   Copier-coller le code suivant dans un nouveau module, puis exécuter la fonction fEnumWindows depuis la fenêtre d'exécution immédiate (Debug Window). La fonction imprime le nom de la classe et le titre de sa fenêtre principale pour toutes les applications actuellement visibles.

'************** Code Start ***************
Private Declare Function apiGetClassName Lib "user32" Alias _
                "GetClassNameA" (ByVal Hwnd As Long, _
                ByVal lpClassname As String, _
                ByVal nMaxCount As Long) As Long
Private Declare Function apiGetDesktopWindow Lib "user32" Alias _
                "GetDesktopWindow" () As Long
Private Declare Function apiGetWindow Lib "user32" Alias _
                "GetWindow" (ByVal Hwnd As Long, _
                ByVal wCmd As Long) As Long
Private Declare Function apiGetWindowLong Lib "user32" Alias _
                "GetWindowLongA" (ByVal Hwnd As Long, ByVal _
                nIndex As Long) As Long
Private Declare Function apiGetWindowText Lib "user32" Alias _
                "GetWindowTextA" (ByVal Hwnd As Long, ByVal _
                lpString As String, ByVal aint As Long) As Long
Private Const mcGWCHILD = 5
Private Const mcGWHWNDNEXT = 2
Private Const mcGWLSTYLE = (-16)
Private Const mcWSVISIBLE = &H10000000
Private Const mconMAXLEN = 255

Function fEnumWindows()
Dim lngx As Long, lngLen As Long
Dim lngStyle As Long, strCaption As String
    
    lngx = apiGetDesktopWindow()
    'Return the first child to Desktop
    lngx = apiGetWindow(lngx, mcGWCHILD)
    
    Do While Not lngx = 0
        strCaption = fGetCaption(lngx)
        If Len(strCaption) > 0 Then
            lngStyle = apiGetWindowLong(lngx, mcGWLSTYLE)
            'enum visible windows only
            If lngStyle And mcWSVISIBLE Then
                Debug.Print "Class = " & fGetClassName(lngx),
                Debug.Print "Caption = " & fGetCaption(lngx)
            End If
        End If
        lngx = apiGetWindow(lngx, mcGWHWNDNEXT)
    Loop
End Function
Private Function fGetClassName(Hwnd As Long) as String
    Dim strBuffer As String
    Dim intCount As Integer
   
    strBuffer = String$(mconMAXLEN - 1, 0)
    intCount = apiGetClassName(Hwnd, strBuffer, mconMAXLEN)
    If intCount > 0 Then
        fGetClassName = Left$(strBuffer, intCount)
    End If
End Function

Private Function fGetCaption(Hwnd As Long) As String
    Dim strBuffer As String
    Dim intCount As Integer

    strBuffer = String$(mconMAXLEN - 1, 0)
    intCount = apiGetWindowText(Hwnd, strBuffer, mconMAXLEN)
    If intCount > 0 Then
        fGetCaption = Left$(strBuffer, intCount)
    End If
End Function
'************** Code End ***************