1、界面如下图:
2、代码如下
Option Explicit
'转载自VBNET
Private Const APP_SYSTRAY_ID = 999
Private Const NOTIFYICON_VERSION = &H3
Private Const NIF_MESSAGE = &H1
Private Const NIF_ICON = &H2
Private Const NIF_TIP = &H4
Private Const NIF_STATE = &H8
Private Const NIF_INFO = &H10
Private Const NIM_ADD = &H0
Private Const NIM_MODIFY = &H1
Private Const NIM_DELETE = &H2
Private Const NIM_SETFOCUS = &H3
Private Const NIM_SETVERSION = &H4
Private Const NIM_VERSION = &H5
Private Const NIS_HIDDEN = &H1
Private Const NIS_SHAREDICON = &H2
'icon flags
Private Const NIIF_NONE = &H0
Private Const NIIF_INFO = &H1
Private Const NIIF_WARNING = &H2
Private Const NIIF_ERROR = &H3
Private Const NIIF_GUID = &H5
Private Const NIIF_ICON_MASK = &HF
Private Const NIIF_NOSOUND = &H10
Private Const WM_USER = &H400
Private Const NIN_BALLOONSHOW = (WM_USER + 2)
Private Const NIN_BALLOONHIDE = (WM_USER + 3)
Private Const NIN_BALLOONTIMEOUT = (WM_USER + 4)
Private Const NIN_BALLOONUSERCLICK = (WM_USER + 5)
'shell version / NOTIFIYICONDATA struct size constants
Private Const NOTIFYICONDATA_V1_SIZE As Long = 88 'pre-5.0 structure size
Private Const NOTIFYICONDATA_V2_SIZE As Long = 488 'pre-6.0 structure size
Private Const NOTIFYICONDATA_V3_SIZE As Long = 504 '6.0+ structure size
Private NOTIFYICONDATA_SIZE As Long
Private Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End Type
Private Type NOTIFYICONDATA
cbSize As Long
hWnd As Long
uID As Long
uFlags As Long
uCallbackMessage As Long
hIcon As Long
szTip As String * 128
dwState As Long
dwStateMask As Long
szInfo As String * 256
uTimeoutAndVersion As Long
szInfoTitle As String * 64
dwInfoFlags As Long
guidItem As GUID
End Type
Private Declare Function Shell_NotifyIcon Lib "shell32.dll" _
Alias "Shell_NotifyIconA" _
(ByVal dwMessage As Long, _
lpData As NOTIFYICONDATA) As Long
Private Declare Function GetFileVersionInfoSize Lib "version.dll" _
Alias "GetFileVersionInfoSizeA" _
(ByVal lptstrFilename As String, _
lpdwHandle As Long) As Long
Private Declare Function GetFileVersionInfo Lib "version.dll" _
Alias "GetFileVersionInfoA" _
(ByVal lptstrFilename As String, _
ByVal dwHandle As Long, _
ByVal dwLen As Long, _
lpData As Any) As Long
Private Declare Function VerQueryValue Lib "version.dll" _
Alias "VerQueryValueA" _
(pBlock As Any, _
ByVal lpSubBlock As String, _
lpBuffer As Any, _
nVerSize As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" _
Alias "RtlMoveMemory" _
(Destination As Any, _
Source As Any, _
ByVal Length As Long)
Private Sub Form_Load()
Text1.Text = "Copyright ?2004-2008 Lipper Zhao, All Rights Reserved." & _
"now available for download from " & _
"http://www.somplace.com/myapp/update/."
Command1.Caption = "Add Systray Icon"
Command2.Caption = "Show Balloon Tip"
Command2.Enabled = False
Option1(0).Caption = "no icon"
Option1(1).Caption = "information icon"
Option1(2).Caption = "warning icon"
Option1(3).Caption = "error icon"
Option1(1).Value = True
End Sub
Private Sub Form_Unload(Cancel As Integer)
ShellTrayRemove
End Sub
Private Sub Command1_Click()
Call ShellTrayAdd
Command2.Enabled = True
End Sub
Private Sub Command2_Click()
ShellTrayModifyTip GetSelectedOptionIndex()
End Sub
Private Sub ShellTrayAdd()
Dim nid As NOTIFYICONDATA
If NOTIFYICONDATA_SIZE = 0 Then SetShellVersion
'set up the type members
With nid
.cbSize = NOTIFYICONDATA_SIZE
.hWnd = Form1.hWnd
.uID = APP_SYSTRAY_ID
.uFlags = NIF_MESSAGE Or NIF_ICON Or NIF_TIP
.dwState = NIS_SHAREDICON
.hIcon = Form1.Icon
'szTip is the tooltip shown when the
'mouse hovers over the systray icon.
'Terminate it since the strings are
'fixed-length in NOTIFYICONDATA.
.szTip = "New Download Watcher" & vbNullChar
.uTimeoutAndVersion = NOTIFYICON_VERSION
End With
'add the icon ...
Call Shell_NotifyIcon(NIM_ADD, nid)
'... and inform the system of the
'NOTIFYICON version in use
Call Shell_NotifyIcon(NIM_SETVERSION, nid)
End Sub
Private Sub ShellTrayRemove()
Dim nid As NOTIFYICONDATA
If NOTIFYICONDATA_SIZE = 0 Then SetShellVersion
With nid
.cbSize = NOTIFYICONDATA_SIZE
.hWnd = Form1.hWnd
.uID = APP_SYSTRAY_ID
End With
Call Shell_NotifyIcon(NIM_DELETE, nid)
End Sub
Private Sub ShellTrayModifyTip(nIconIndex As Long)
Dim nid As NOTIFYICONDATA
If NOTIFYICONDATA_SIZE = 0 Then SetShellVersion
With nid
.cbSize = NOTIFYICONDATA_SIZE
.hWnd = Form1.hWnd
.uID = APP_SYSTRAY_ID
.uFlags = NIF_INFO
.dwInfoFlags = nIconIndex
'InfoTitle is the balloon tip title,
'and szInfo is the message displayed.
'Terminating both with vbNullChar prevents
'the display of the unused padding in the
'strings defined as fixed-length in NOTIFYICONDATA.
.szInfoTitle = "New Download Available!" & vbNullChar
.szInfo = Text1.Text & vbNullChar
End With
Call Shell_NotifyIcon(NIM_MODIFY, nid)
End Sub
Private Sub SetShellVersion()
Select Case True
Case IsShellVersion(6)
NOTIFYICONDATA_SIZE = NOTIFYICONDATA_V3_SIZE '6.0+ structure size
Case IsShellVersion(5)
NOTIFYICONDATA_SIZE = NOTIFYICONDATA_V2_SIZE 'pre-6.0 structure size
Case Else
NOTIFYICONDATA_SIZE = NOTIFYICONDATA_V1_SIZE 'pre-5.0 structure size
End Select
End Sub
Private Function IsShellVersion(ByVal version As Long) As Boolean
'returns True if the Shell version
'(shell32.dll) is equal or later than
'the value passed as 'version'
Dim nBufferSize As Long
Dim nUnused As Long
Dim lpBuffer As Long
Dim nVerMajor As Integer
Dim bBuffer() As Byte
Const sDLLFile As String = "shell32.dll"
nBufferSize = GetFileVersionInfoSize(sDLLFile, nUnused)
If nBufferSize > 0 Then
ReDim bBuffer(nBufferSize - 1) As Byte
Call GetFileVersionInfo(sDLLFile, 0&, nBufferSize, bBuffer(0))
If VerQueryValue(bBuffer(0), "\", lpBuffer, nUnused) = 1 Then
CopyMemory nVerMajor, ByVal lpBuffer + 10, 2
IsShellVersion = nVerMajor >= version
End If 'VerQueryValue
End If 'nBufferSize
End Function
Private Function GetSelectedOptionIndex() As Long
'returns the selected item index from
'an option button array. Use in place
'of multiple If...Then statements!
'If your array contains more elements,
'just append them to the test condition,
'setting the multiplier to the button's
'negative -index.
GetSelectedOptionIndex = Option1(0).Value * 0 Or _
Option1(1).Value * -1 Or _
Option1(2).Value * -2 Or _
Option1(3).Value * -3
End Function
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