Taskbar and Tray

How do I place an icon in the task tray when my program is minimized?

Re: Taskbar and Tray

place this into a module:

'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

place this into Form_load():

'ShowTray-Icon!
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 = "Stundenabrechnungsprogramm" & vbNullChar
End With
Shell_NotifyIcon NIM_ADD, nid

and the 3rd step:
Private Sub Form_Resize() 'this is necessary to assure that the minimized window is hidden End Sub
If Me.WindowState = vbMinimized Then Me.Hide
End Sub

Re: Taskbar and Tray

The only question I have now is how do I capture the event of the user clicking on my status area icon? Do you know of any good documentation on such things?

Re: Taskbar and Tray

That code *almost* works how you want it - here's a refined version that'll do what you want:

In a BAS module, place the following code :

option Explicit

'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

Now take a form (Form1) and place a PictureBox on it (Picture1). This picturebox will handle all the events from the task bar. Set the Picture1.visible property to false from the ide. Now paste in the following code :

option Explicit

private Sub Form_Load()
'
' Create our system tray icon from the Form's icon
'
SetupSysTrayIcon
End Sub

private Sub Form_Resize()
'
' If minimized, then hide the form
'
If me.WindowState = vbMinimized then me.Visible = false
End Sub

private Sub Form_Unload(Cancel as Integer)
'
' Remember to kill the systray icon, otherwise it hangs around
' till we move a mouse pointer over it
'
KillSysTrayIcon
End Sub

private Sub SetupSysTrayIcon()
on error GoTo vbErrorHandler
'
' Setup the System Tray Icon
'
Dim tTrayStuff as NOTIFYICONDATA

With tTrayStuff
.cbSize = len(tTrayStuff)
.hwnd = Picture1.hwnd
.uId = 1&
.uFlags = NIF_ICON Or NIF_TIP Or NIF_MESSAGE
.uCallBackMessage = WM_MOUSEMOVE
.hIcon = me.Icon
.szTip = "Your Tooltip Goes Here" & vbNullChar
Shell_NotifyIcon NIM_ADD, tTrayStuff
End With

Exit Sub

vbErrorHandler:
MsgBox Err.Number & " " & Err.Description & " " & _
Err.Source & "::Form1_SetupSysTrayIcon", , App.ProductName
End Sub

private Sub KillSysTrayIcon()
Dim t as NOTIFYICONDATA
'
' Kill the icon in the system tray
'
With t
.cbSize = len(t)
.hwnd = Picture1.hwnd
.uId = 1&
End With

Shell_NotifyIcon NIM_DELETE, t

End Sub

private Sub Picture1_MouseMove(Button as Integer, Shift as Integer, x as Single, y as Single)
'
' Here's where we handle the Icon Tray Messages
'
Dim lMsg as Long
'
' Because of possible recursion - use a static flag
'
static bInHere as Boolean

on error GoTo vbErrorHandler
'
' The actual message is stored in the 'x' value - the correct
' way to get the messages is to subclass, but this hack works
' in VB5/6 so it'll do for now.
'
lMsg = x / Screen.TwipsPerPixelX

If bInHere then Exit Sub

bInHere = true

Select Case lMsg
Case WM_LBUTTONDBLCLK:
'
' on Mouse DoubleClick - Restore the window
'
on error resume next
me.Visible = true

If me.WindowState = vbMinimized then
me.WindowState = vbDefault
End If
me.ZOrder
me.Visible = true

End Select

bInHere = false

Exit Sub

vbErrorHandler:
MsgBox Err.Number & " " & Err.Description & " " & Err.Source & _
" test::picture1_MouseMove", , App.ProductName
End Sub

- That's it.

Chris Eastwood

CodeGuru - the website for developers
http://codeguru.developer.com/vb

Re: Taskbar and Tray

I do I use subclassing if that's actually the correct way of doing this? How do I create a right click menu? I understand how to implement it but not how to create it. Thank you to those that have helped me.

Re: Taskbar and Tray

Making a popup menu is easy. Use the menu builder and create the menu that you would like to popup (if you already have a working menu that you would like to use, then that'll work).

Then on the mouse down, click, whatever events just use me.popupmenu

Peice of cake! :)

Brewguru99

Re: Taskbar and Tray

forgot yesterday (sorry):

private Sub Form_MouseMove(Button as Integer, Shift as Integer, X as Single, Y as Single)
'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)
PopupMenu mnuFile
End Select

End Sub