Question

VB 托盘 图标更改

还有怎么更改鼠标移到托盘图标时显示的文字？？

Answer 1

调用API函数来实现，在模块中编写。

'系统托盘
Public OldWindowProc As Long
Public TheForm As Form
Public TheMenu As Menu
Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Declare Function Shell_NotifyIcon Lib "shell32.dll" Alias "Shell_NotifyIconA" (ByVal dwMessage As Long, lpData As NOTIFYICONDATA) As Long
Public Const WM_USER = &H400
Public Const WM_LBUTTONUP = &H202
Public Const WM_MBUTTONUP = &H208
Public Const WM_RBUTTONUP = &H205
Public Const TRAY_CALLBACK = (WM_USER + 1001&)
Public Const GWL_WNDPROC = (-4)
Public Const GWL_USERDATA = (-21)
Public Const NIF_ICON = &H2
Public Const NIF_TIP = &H4
Public Const NIM_ADD = &H0
Public Const NIF_MESSAGE = &H1
Public Const NIM_MODIFY = &H1
Public Const NIM_DELETE = &H2

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
Private TheData As NOTIFYICONDATA

'系统托盘处理过程
' 捕获托盘动作
Public Function NewWindowProc(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
If Msg = TRAY_CALLBACK Then
If lParam = WM_LBUTTONUP Then
If TheForm.WindowState = vbMinimized Then
TheForm.WindowState = vbNormal
End If
TheForm.Show
Exit Function
End If
If lParam = WM_RBUTTONUP Then
TheForm.PopupMenu TheForm.mnu_File
Exit Function
End If
End If
NewWindowProc = CallWindowProc(OldWindowProc, hWnd, Msg, wParam, lParam)
End Function
' 添加托盘图标
Public Sub AddToTray(frm As Form, Optional mnu As Menu)
Set TheForm = frm
Set TheMenu = mnu
OldWindowProc = SetWindowLong(frm.hWnd, GWL_WNDPROC, AddressOf NewWindowProc)
With TheData
.uID = 0
.hWnd = frm.hWnd
.cbSize = Len(TheData)
.hIcon = frm.Icon.Handle
.uFlags = NIF_ICON
.uCallbackMessage = TRAY_CALLBACK
.uFlags = .uFlags Or NIF_MESSAGE
.cbSize = Len(TheData)
End With
Shell_NotifyIcon NIM_ADD, TheData
End Sub
' 移除托盘图标
Public Sub RemoveFromTray()
With TheData
.uFlags = 0
End With
Shell_NotifyIcon NIM_DELETE, TheData
SetWindowLong TheForm.hWnd, GWL_WNDPROC, OldWindowProc
End Sub
' 设置托盘显示的文字
Public Sub SetTrayTip(tip As String)
With TheData
.szTip = tip & vbNullChar
.uFlags = NIF_TIP
End With
Shell_NotifyIcon NIM_MODIFY, TheData
End Sub
窗体中的代码自己调用上面几个函数就可以了。

Answer 2

Shell_NotifyIcon NIM_MODIFY, TheData

thedata.szTip="你要显示的文字 "
这 个只需这样设置，当你将鼠标称到托盘图标时就会显示文字