Zum Verwenden der Taskleiste direkt von Visual Basic

Folgen Sie diesem Beispiel Schritt für Schritt.

1. Fügen Sie den folgenden Code der Deklarationsabschnitt eines ein Standard-Modul in Ihrem Projekt:

         'user defined type required by Shell_NotifyIcon API call
         Public Type NOTIFYICONDATA
          cbSize As Long
          hwnd As Long
          uId As Long
          uFlags As Long
          uCallBackMessage As Long
          hIcon As Long
          szTip As String * 64
         End Type
   
         'constants required by Shell_NotifyIcon API call:
         Public Const NIM_ADD = &H0
         Public Const NIM_MODIFY = &H1
         Public Const NIM_DELETE = &H2
         Public Const NIF_MESSAGE = &H1
         Public Const NIF_ICON = &H2
         Public Const NIF_TIP = &H4
         Public Const WM_MOUSEMOVE = &H200
         Public Const WM_LBUTTONDOWN = &H201     'Button down
         Public Const WM_LBUTTONUP = &H202       'Button up
         Public Const WM_LBUTTONDBLCLK = &H203   'Double-click
         Public Const WM_RBUTTONDOWN = &H204     'Button down
         Public Const WM_RBUTTONUP = &H205       'Button up
         Public Const WM_RBUTTONDBLCLK = &H206   'Double-click
   
         Public Declare Function SetForegroundWindow Lib "user32" _
         (ByVal hwnd As Long) As Long
         Public Declare Function Shell_NotifyIcon Lib "shell32" _
         Alias "Shell_NotifyIconA" _
         (ByVal dwMessage As Long, pnid As NOTIFYICONDATA) As Boolean
   
         Public nid As NOTIFYICONDATA
   					

2. Fügen Sie folgenden Code für alle im Projekt, die Sie das Taskleistensymbol oder Notification Symbol für reagieren möchten Ihre Anwendung:

         Private Sub Form_Load()
          'the form must be fully visible before calling Shell_NotifyIcon
          Me.Show
          Me.Refresh
          With nid
           .cbSize = Len(nid)
           .hwnd = Me.hwnd
           .uId = vbNull
           .uFlags = NIF_ICON Or NIF_TIP Or NIF_MESSAGE
           .uCallBackMessage = WM_MOUSEMOVE
           .hIcon = Me.Icon
           .szTip = "Your ToolTip" & vbNullChar
          End With
          Shell_NotifyIcon NIM_ADD, nid
         End Sub
   
         Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
         'this procedure receives the callbacks from the System Tray icon.
         Dim Result As Long
         Dim msg As Long
          'the value of X will vary depending upon the scalemode setting
          If Me.ScaleMode = vbPixels Then
           msg = X
          Else
           msg = X / Screen.TwipsPerPixelX
          End If
          Select Case msg
           Case WM_LBUTTONUP        '514 restore form window
            Me.WindowState = vbNormal
            Result = SetForegroundWindow(Me.hwnd)
            Me.Show
           Case WM_LBUTTONDBLCLK    '515 restore form window
            Me.WindowState = vbNormal
            Result = SetForegroundWindow(Me.hwnd)
            Me.Show
           Case WM_RBUTTONUP        '517 display popup menu
            Result = SetForegroundWindow(Me.hwnd)
            Me.PopupMenu Me.mPopupSys
          End Select
         End Sub
   
         Private Sub Form_Resize()
          'this is necessary to assure that the minimized window is hidden
          If Me.WindowState = vbMinimized Then Me.Hide
         End Sub
   
         Private Sub Form_Unload(Cancel As Integer)
          'this removes the icon from the system tray
          Shell_NotifyIcon NIM_DELETE, nid
         End Sub
   
         Private Sub mPopExit_Click()
          'called when user clicks the popup menu Exit command
          Unload Me
         End Sub
   
         Private Sub mPopRestore_Click()
          'called when the user clicks the popup menu Restore command
          Dim Result As Long
          Me.WindowState = vbNormal
          Result = SetForegroundWindow(Me.hwnd)
          Me.Show
         End Sub
   					

3. Stellen Sie den folgenden Eigenschafteneinstellungen auf dem gleichen Formular die oben stehenden Code hinzufügen:

      Property         Required Setting for Taskbar Notification Area example
      -----------------------------------------------------------------------
      Icon           = The icon you want to appear in the system tray.
      Minbutton      = True
      ShownInTaskbar = False
   					

4. Folgende Menüelemente hinzufügen, mit dem gleichen Formular mithilfe der Menü-Editor:

      Caption      Name          Enabled   Visible   Position
      ---------------------------------------------------------
      &SysTray     mPopupSys      True      False    Main Level
      &Restore     mPopRestore    True      True     Inset one
      &Exit        mPopExit       True      True     Inset one
   					

Taskbar Notification Area Flexibilität

   .szTip = "Your ToolTip" & vbNullChar
				

   .hIcon = Me.Icon
				

   Shell_NotifyIcon NIM_MODIFY, nid.
				

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