show icon on the right bottom of toolbar

Posted on 1998-08-10
Last Modified: 2010-04-30
I want to write a program which icon will be showed on the right bottom of the toolbar(That's besides the clock) How can I do that using VB.
Question by:Torus

Expert Comment

ID: 1468443
This is called system tray. You need to use subclassing to do that. You can find an example of that on


Accepted Solution

SPECIALIST earned 50 total points
ID: 1468444
This is the best one I know of:

Option Explicit

    cbSize As Long
    hWnd As Long
    uId As Long
    uFlags As Long
    ucallbackMessage As Long
    hIcon As Long
    szTip As String * 64
End Type

Private Const NIM_ADD = &H0
Private Const NIM_MODIFY = &H1
Private Const NIM_DELETE = &H2
Private Const WM_MOUSEMOVE = &H200
Private Const NIF_MESSAGE = &H1
Private Const NIF_ICON = &H2
Private Const NIF_TIP = &H4

Private Const WM_LBUTTONDBLCLK = &H203
Private Const WM_LBUTTONDOWN = &H201
Private Const WM_LBUTTONUP = &H202
Private Const WM_RBUTTONDBLCLK = &H206
Private Const WM_RBUTTONDOWN = &H204
Private Const WM_RBUTTONUP = &H205

Private Declare Function Shell_NotifyIcon Lib "shell32" Alias "Shell_NotifyIconA" (ByVal dwMessage As Long, pnid As NOTIFYICONDATA) As Boolean

Private Sub Form_Load()
Timer1.Interval = 1000
    t.cbSize = Len(t)
    t.hWnd = pichook.hWnd
    t.uId = 1&
    t.ucallbackMessage = WM_MOUSEMOVE
    t.hIcon = Me.Icon
    t.szTip = "Shell_NotifyIcon ..." & Chr$(0)
    Shell_NotifyIcon NIM_ADD, t
    App.TaskVisible = False
End Sub

Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
    t.cbSize = Len(t)
    t.hWnd = pichook.hWnd
    t.uId = 1&
    Shell_NotifyIcon NIM_DELETE, t
End Sub

Private Sub mnuMain_Click(Index As Integer)
    Unload Me
End Sub

Private Sub pichook_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Static rec As Boolean, msg As Long
    msg = X / Screen.TwipsPerPixelX
    If rec = False Then
        rec = True
        Select Case msg
            Case WM_LBUTTONDBLCLK:
                MsgBox "Double click !"
            Case WM_LBUTTONDOWN:
            Case WM_LBUTTONUP:
            Case WM_RBUTTONDBLCLK:
            Case WM_RBUTTONDOWN:
            Case WM_RBUTTONUP:
                Me.PopupMenu mnuBar
        End Select
        rec = False
    End If
End Sub

You can customize it to fit your environment.


Author Comment

ID: 1468445
Hi Specialist,

Thanks for your solution.
However, I feel very ridiculous how the function pichook_mousemove function works.
Firstly, I thought you typed something wrongly at  "Msg = X /Screen.TwipsPerPixelX  ".
But after I tried it, it does works without needing subclass. Would you pls tell me the mechanism that how it works. Also, I know little about graphics. I don't understand why
Screen.TwipsPerPixelX is a constant even I change to any resolution since Twips is  screen-independent.

Also Thanks to topol. The sites seems very helpful


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