VB实现在任务栏上加上程序图标

Option Explicit
Const MAX_TOOLTIP As Integer = 64
Const NIF_ICON = &H2 ''删除图标
Const NIF_MESSAGE = &H1
Const NIF_TIP = &H4
Const NIM_ADD = &H0 ''添加图标到任务栏提示区
Const NIM_DELETE = &H2
Const WM_MOUSEMOVE = &H200
Const WM_LBUTTONDOWN = &H201
Const WM_LBUTTONUP = &H202
Const WM_LBUTTONDBLCLK = &H203
Const WM_RBUTTONDOWN = &H204
Const WM_RBUTTONUP = &H205
Const WM_RBUTTONDBLCLK = &H206
Const SW_RESTORE = 9
Const SW_HIDE = 0
Private Type NOTIFYICONDATA
cbSize As Long
hwnd As Long
uID As Long
uFlags As Long
uCallbackMessage As Long
hIcon As Long
szTip As String * MAX_TOOLTIP
End Type
Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, _
ByVal nCmdShow As Long) As Long

Private Declare Function Shell_NotifyIcon Lib "shell32.dll" Alias "Shell_NotifyIconA" _
(ByVal dwMessage As Long, lpData As NOTIFYICONDATA) As LongPrivate nfIconData As NOTIFYICONDATAPrivate Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim lMsg As Single
lMsg = X / Screen.TwipsPerPixelX
If lMsg = WM_RBUTTONUP Or lMsg = WM_LBUTTONUP Then Me.PopupMenu sys
End SubPrivate Sub command1_Click()
nfIconData.hwnd = Me.hwnd
nfIconData.uID = Me.Icon
nfIconData.uFlags = NIF_ICON Or NIF_MESSAGE Or NIF_TIP
nfIconData.uCallbackMessage = WM_MOUSEMOVE
nfIconData.hIcon = Me.Icon.Handle
nfIconData.szTip = "System Tray Example" & vbNullChar
nfIconData.cbSize = Len(nfIconData)
Call Shell_NotifyIcon(NIM_ADD, nfIconData)
End SubPrivate Sub command2_Click()
Call Shell_NotifyIcon(NIM_DELETE, nfIconData)
End SubPrivate Sub command3_Click()
ShowWindow Me.hwnd, SW_HIDE
End SubPrivate Sub command4_Click()
Unload Me
End SubPrivate Sub Command5_Click()
Me.Visible = False
End SubPrivate Sub move_Click()
Call Shell_NotifyIcon(NIM_DELETE, nfIconData)
End SubPrivate Sub show_Click()
Me.Visible = True
End SubPrivate Sub exit_Click()
Unload Me
End Sub