| | | VB6.0实现系统托盘 | | 2002-01-06·
·张新华··yesky
| 上一页 1 2
以下是程序清单：
Option Explicit
Private Declare Function Shell_NotifyIcon Lib "shell32.dll" Alias "Shell_NotifyIconA" (ByVal dwMessage As Long, lpData As NOTIFYICONDATA) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_SYSCOMMAND = &H112
Private Const SC_RESTORE = &HF120&
Private LastState As Integer '保留原窗口状态
'---------- dwMessage可以是以下NIM_ADD、NIM_DELETE、NIM_MODIFY 标识符之一----------
Private Const NIM_ADD = &H0 '在任务栏中增加一个图标
Private Const NIM_DELETE = &H2 '删除任务栏中的一个图标
Private Const NIM_MODIFY = &H1 '修改任务栏中个图标信息
Private Const NIF_MESSAGE = &H1 'NOTIFYICONDATA结构中uFlags的控制信息
Private Const NIF_ICON = &H2
Private Const NIF_TIP = &H4
Private Const WM_MOUSEMOVE = &H200 '当鼠标指针移至图标上
Private Const WM_LBUTTONUP = &H202
Private Const WM_RBUTTONUP = &H205
Private Type NOTIFYICONDATA
cbSize As Long '该数据结构的大小
hwnd As Long '处理任务栏中图标的窗口句柄
uID As Long '定义的任务栏中图标的标识
uFlags As Long '任务栏图标功能控制，可以是以下值的组合（一般全包括）
'NIF_MESSAGE 表示发送控制消息；
'NIF_ICON表示显示控制栏中的图标；
'NIF_TIP表示任务栏中的图标有动态提示。
uCallbackMessage As Long '任务栏图标通过它与用户程序交换消息，处理该消息的窗口由hWnd决定
hIcon As Long '任务栏中的图标的控制句柄
szTip As String * 64 '图标的提示信息
End Type
Dim myData As NOTIFYICONDATA
Private Sub Form_Load()
If WindowState = vbMinimized Then
LastState = vbNormal
Else
LastState = WindowState
End If
With myData
.cbSize = Len(myData)
.hwnd = Me.hwnd
.uID = 0
.uFlags = NIF_ICON Or NIF_MESSAGE Or NIF_TIP
.uCallbackMessage = WM_MOUSEMOVE
.hIcon = Me.Icon.Handle '默认为窗口图标
.szTip = "提示" & vbNullChar
End With
Shell_NotifyIcon NIM_ADD, myData
End Sub
Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Select Case CLng(X)
Case WM_RBUTTONUP '鼠标在图标上右击时弹出菜单
Me.PopupMenu mnuTray
Case WM_LBUTTONUP '鼠标在图标上左击时窗口若最小化则恢复窗口位置
If Me.WindowState = vbMinimized Then
Me.WindowState = LastState
Me.SetFocus
End If
End Select
End Sub
Private Sub Form_Unload(Cancel As Integer)
Shell_NotifyIcon NIM_DELETE, myData '窗口卸载时，将状态栏中的图标一同卸载
End Sub
Private Sub mnuExit_Click()
Unload Me
End Sub
Private Sub mnuTrayChangeIcon_Click()
On Error GoTo ErrHandler
With cdlOpen
.CancelError = True ' 设置标志
.InitDir = App.Path ' 默认的文件夹为当前文件夹
.Flags = cdlOFNHideReadOnly ' 设置过滤器
.Filter = "图标文件 (*.ico)|*.ico" ' 指定缺省的过滤器为图标文件
.ShowOpen ' 显示选定文件的名字
End With
Image1.Picture = LoadPicture(cdlOpen.FileName)
With myData
.hIcon = Image1.Picture
.uFlags = NIF_ICON
End With
Shell_NotifyIcon NIM_MODIFY, myData
ErrHandler: ' 用户按了"取消"按钮
Exit Sub
End Sub
Private Sub mnuTrayClose_Click()
Unload Me
End Sub
Private Sub Form_Resize()
Select Case WindowState
Case vbMinimized
mnuTrayMaximize.Enabled = True
mnuTrayMinimize.Enabled = False
mnuTrayRestore.Enabled = True
Case vbMaximized
mnuTrayMaximize.Enabled = False
mnuTrayMinimize.Enabled = True
mnuTrayRestore.Enabled = True
Case vbNormal
mnuTrayMaximize.Enabled = True
mnuTrayMinimize.Enabled = True
mnuTrayRestore.Enabled = False
End Select
If WindowState <> vbMinimized Then LastState = WindowState
End Sub
Private Sub mnuTrayMaximize_Click()
WindowState = vbMaximized
End Sub
Private Sub mnuTrayMinimize_Click()
WindowState = vbMinimized
End Sub
Private Sub mnuTrayRestore_Click()
SendMessage hwnd, WM_SYSCOMMAND, SC_RESTORE, 0&
End Sub |
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