Option Compare Database
Option Explicit

Private Const GW_HWNDFIRST = 0
Private Const GW_OWNER = 4
Private Const GW_HWNDNEXT = 2
Private Const SW_MAXIMIZE = 3
Private Const SW_MINIMIZE = 6
Private Const SW_NORMAL = 1
Private Declare Function GetWindow Lib "user32" (ByVal hWnd As Long, ByVal wCmd As Long) As Long
Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hWnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function IsWindowVisible Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function GetActiveWindow Lib "user32" () As Long
Private Declare Function ShowWindow Lib "user32" (ByVal hWnd As Long, ByVal nCmdShow As Long) As Long

Function FensterSuchen(FensterTitel As String, Optional retValue)

    Dim hWnd, strTitel As String, Longe As Long, Ret As Long
    hWnd = GetActiveWindow()
    If hWnd Then
        Do While hWnd
        strTitel = String$(255, 0)
        Longe = Len(strTitel)
        Ret = GetWindowText(hWnd, strTitel, Longe)
        strTitel = Left$(strTitel, InStr(strTitel, Chr$(0)) - 1)
        If IsWindowVisible(hWnd) And GetWindow(hWnd, GW_OWNER) = 0 Then
            If strTitel Like FensterTitel Then
                If IsMissing(retValue) Then
                    FensterSuchen = strTitel
                Else
                    FensterSuchen = hWnd
                End If
                Exit Function
            End If
        End If
        hWnd = GetWindow(hWnd, GW_HWNDNEXT)
        Loop
    End If
    If IsMissing(retValue) Then
        FensterSuchen = ""
    Else
        FensterSuchen = 0
    End If
   
End Function

Function TaskListen()

    Dim hWnd, strTitel As String, Ret As Long, Longe As Long
    Dim Tmp As String
    hWnd = GetActiveWindow()
    If hWnd Then
        Do While hWnd
            strTitel = String$(255, 0)
            Longe = Len(strTitel)
            Ret = GetWindowText(hWnd, strTitel, Longe)
            strTitel = Left$(strTitel, InStr(strTitel, Chr$(0)) - 1)
            If Is