VB实现窗口最小化到任务栏

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要实现窗口最小化必须满足以下条件:

1:按下最小化按钮,窗体不可见

2:最小化后,最小化窗体的图标必须出现在任务栏的通知区域中

3:当双击通知区域中的图标时,窗体又显示出来,同时通知区域中的图标消失.

要满足上面的条件:

1:首先屏蔽窗体中系统自带的最小化图标,即ton=False

2:声明1个API函数:

Public Declare Function Shell_NotifyIcon Lib "" Alias " Shell_NotifyIconA" (ByVal

dwMessage As Long, lpData As NOTIFYICONDATA) As Long

注意:上面这个API函数在XP中没有别名,将别名去掉后为:

Public Declare Function Shell_NotifyIcon Lib ""(ByVal dwMessage As Long, lpData

As NOTIFYICONDATA) As Long

3:声明7个常数:

Public Const NIM_ADD = &H0

Public Const NIM_DELETE = &H2

Public Const NIF_ICON = &H2

Public Const NIF_MESSAGE = &H1

Public Const NIF_TIP = &H4

Public Const WM_MOUSEMOVE = &H200

Public Const WM_LBUTTONDBLCLK = &H203

4:定义1个NOTIFYICONDATA类型

Public Type NOTIFYICONDATA

cbSize as Long

hWnd as Long

uId as Long

uFlags as Long

uCallBackMessage as Long

hIcon as Long

szTip as String

End Type

5:声明一个nid的类型

Public nid as NOTIFYICONDATA

思路清晰后,开场编写代码

1:在窗体中画1个mand,它的Caption属性为:"最小化"

2:将窗体Form的MinButton的属性设为:"False"

3:在窗体中添加1个模块,模块中的代码为:

Public Declare Function Shell_NotifyIcon Lib ""(ByVal dwMessage As Long, lpData

As NOTIFYICONDATA) As Long

Public Const NIM_ADD = &H0

Public Const NIM_DELETE = &H2

Public Const NIF_ICON = &H2

Public Const NIF_MESSAGE = &H1

Public Const NIF_TIP = &H4

Public Const WM_MOUSEMOVE = &H200

-优选

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Public Const WM_LBUTTONDBLCLK = &H203

Public Type NOTIFYICONDATA

cbSize as Long

hWnd as Long

uId as Long

uFlags as Long

uCallBackMessage as Long

hIcon as Long

szTip as String

End Type

Public nid as NOTIFYICONDATA

4:编写mand的单击事件:

Private Sub mand1_Click()

= Len(nid)

= vbNull

=

= NIF_TIP Or NIF_MESSAGE Or NIF_ICON

ackMessage = WM_MOUSEMOVE

=

= "窗体最小化"

Shell_NotifyIcon NIM_ADD, nid

End Sub

5:编写窗体的MouseMove事件:

Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)

Dim msg As Long

msg = X / 15

If msg = WM_LBUTTONDBLCLK Then

Shell_NotifyIcon NIM_DELETE, nid

End If

End Sub

按F5启动,单击mand,看看通知区域中是不是多了个窗体的图标"双击该图标,窗体又显示出来了!

如何做到当我们单击窗口的最小化按钮时，窗口先最小化到任务栏成为按钮，然后消失，图标显示到通知栏呢？大家熟悉的FoxMail能做到，我们也可以做到。 只要我们能截获最小化这个事件发送给窗口的消息，然后换成我们自定义的过程，问题就解决了。大家仔细想一想，当按下最小化按纽时会引发什么事件？最小化时窗口大小会发生变化会引发事件，我们只要在事件里用e = False使窗口消失，然后将窗口图标显示到通知栏即可到达我们想要的效果。 怎样判断发生Resize事件时窗口是最小化状态呢？VB里没有现成的做法，我们可以用非富的API函数。API函数库里有一个函数IsIconic〔ByVal hwnd As Long〕，它就是专门判断窗口是否已最小化的。这样当Form产生Resize事件时，用IsIconic函数判断一下窗口是否为最小化状态，就可知道是否用户按了最小化按钮。

最关键的一步就是将图标显示在通知栏里，VB里没有现成的做法，我们还得用API函数。API函数库里有一个函数Shell_NotifyIcon(ByVal dwMessage As Long, lpData As NOTIFYICONDATA)，是专门操作〔包-优选

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括添加、修改、删除〕通知栏里图标的。 点一下通知栏图标，会出现一些诸如"退出"、"显示窗口"的弹出菜单，怎样实现弹出菜单呢？这个很容易实现，因为点击图标会触发图标所在窗口的MouseDown事件，我们把弹出菜单触发过程写入Form1_MouseDown事件即可。具体例程如下： 第一步、为了增强程序的可移植性，我们新建一个模块，取名为：NoticeIcon，在此模块中定义一些常量、自定义类型、所需的API函数说明及操作通知栏图标的三个自定义函数〔添加、修改、删除〕，模块NoticeIcon具体代码如下所示：

Public Const DefaultIconIndex = 1 '图标缺省索引

Public Const WM_LBUTTONDOWN = &H201 '按鼠标左键

Public Const WM_RBUTTONDOWN = &H204 '按鼠标右键

Public Const NIM_ADD = 0 '添加图标

Public Const NIM_MODIFY = 1 '修改图标

Public Const NIM_DELETE = 2 '删除图标

Public Const NIF_MESSAGE = 1 'message 有效

Public Const NIF_ICON = 2 '图标操作〔添加、修改、删除〕有效

Public Const NIF_TIP = 4 'ToolTip(提示〕有效

'API函数声明

'图标操作

Declare Function Shell_NotifyIcon Lib "" Alias "Shell_NotifyIconA" (ByVal dwMessage As

Long, lpData As NOTIFYICONDATA) As Long

'判断窗口是否最小化

Declare Function IsIconic Lib "user32" (ByVal hwnd As Long) As Long

'

'设置窗口位置和状态〔position〕的功能

Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long,

ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As

Long

'定义类型

'通知栏图标状态

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

'函数定义

'添加图标至通知栏

-优选

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Public Function Icon_Add(iHwnd As Long, sTips As String, hIcon As Long, IconID As Long) As Long

'参数说明：iHwnd：窗口句柄，sTips：当鼠标移到通知栏图标上时显示的提示内容

'hIcon：图标句柄，IconID：图标Id号

Dim IconVa As NOTIFYICONDATA

With IconVa

.hwnd = iHwnd

.szTip = sTips + Chr$(0)

.hIcon = hIcon

.uID = IconID

.uCallbackMessage = WM_LBUTTONDOWN

.cbSize = Len(IconVa)

.uFlags = NIF_MESSAGE Or NIF_ICON Or NIF_TIP

Icon_Add = Shell_NotifyIcon(NIM_ADD, IconVa)

End With

End Function

'删除通知栏图标(参数说明同Icon_Add)

Function Icon_Del(iHwnd As Long, lIndex As Long) As Long

Dim IconVa As NOTIFYICONDATA

Dim L As Long

With IconVa

.hwnd = iHwnd

.uID = lIndex

.cbSize = Len(IconVa)

End With

Icon_Del = Shell_NotifyIcon(NIM_DELETE, IconVa)

End Function

'修改通知栏图标(参数说明同Icon_Add)

Public Function Icon_Modify(iHwnd As Long, sTips As String, hIcon As Long, IconID As Long) As Long

Dim IconVa As NOTIFYICONDATA

With IconVa

.hwnd = iHwnd

.szTip = sTips + Chr$(0)

.hIcon = hIcon

.uID = IconID

.uCallbackMessage = WM_LBUTTONDOWN

.cbSize = Len(IconVa)

.uFlags = NIF_MESSAGE Or NIF_ICON Or NIF_TIP

Icon_Modify = Shell_NotifyIcon(NIM_MODIFY, IconVa)

End With

End Function

第二步：新建一窗口，取名为：Form1： 1、 设置属性如下：

.Name=Form1

.Caption="通知栏图标测试"

.Icon=〔Icon〕，选择一个漂亮的图标

-优选

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其它默认即可

2、 设置窗口全局变量，并设置初始值

'用于标识窗口是否已经按过最小化按纽

Dim MinFlag As Boolean

Private Sub Form1_Load()

MinFlag = False

End Sub

3、 窗口最小化时产生Resize事件，设置事件，判断窗口是否最小化

Private Sub Form1_Resize()

'判断窗口是否最小化状态，并且是按最小化按纽后第一次发生Resize事件

If IsIconic() <> 0 And MinFlag = False Then

MinFlag = True

e = False '隐藏窗口

'将窗口图标参加通知栏

Call Icon_Add(, n, , 0)

End If

End Sub

4、如下图用菜单设计器建一个弹出菜单，取名为main，main内有一个菜单数组： 菜单一：m_Menu(0) 标题：显示窗口 菜单二：m_Menu(1)〕标题：退出 菜单事件：

Private Sub m_Menu_Click(Index As Integer)

Select Case Index

Case 0: '当单击"显示窗口"菜单时

Call Icon_Del(, 0) '删除通知栏图标

'调出窗口

Case 1: '当单击"退出"菜单时

Call Icon_Del(, 0) '删除通知栏图标

End '退出程序

End Select

End Sub

5、设置Form_MouseDown事件，用于单通知栏图标时调出弹出菜单

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

Dim L

L = X 15

'点击通知栏图标，用鼠标右键时调出弹出菜单

IF L = WM_LBUTTONDOWN Then

enu m_Main

'点击通知栏图标，用鼠标左键时，将通知栏图标改为另外的图标

ElseIF L = WM_LBUTTONDOWN Then

Call Icon_Modify(,n, LoadPicture("D:"), 0)

End If

End Sub

程序编写完毕，设置工程的主程序为Form1，保存后运行。按下窗口最小化按纽，窗口消失，并在通知栏显示出窗口的图标；将鼠标移到图标上，有"通知栏图标测试"提示文本显示；用鼠标左键单击通知栏-优选

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图标，图标变成另外的图案；单出鼠标右键，出现如上图所示的弹出菜单，接着单击弹出菜单"显示窗体"，通知栏图标消失、窗口又恢复成原来的样子了，单击菜单"退出"那么退出程序了。

-优选