有点急..查了好久资料了 在线等 ..望解答..
我写个函数 af()
Private Sub Command1_Click()
af
MsgBox "aa"
End Sub
有没有可能 我点击按钮了 不弹出提示 .. 我一点思路也没有 想用HOOK 把点击事件在af的最后给吸收了... 有点高深 VB死了几次
若用HOOK应该怎么写
求助,.... 有没有别的办法
问题点数:20、回复次数:4Top
1 楼xiaoMONKEY(小猴)回复于 2005-08-02 13:47:05 得分 20
是不是你函数是个死循环.
运行调试一下,运行后按下CTRL+ALT+PASUE BREAK看光标在哪Top
2 楼hot1kang1(网站制作,系统开发,记得-http://3q2008.Com)回复于 2005-08-02 13:52:53 得分 0
.... 哥哥 谢谢你 当不根本不时这个意思Top
3 楼kmlxk(xiaoKKKK)回复于 2005-08-02 14:16:45 得分 0
@_@ 看啊~下面的程序获得了Msgbox的hwnd,有了handle,想关闭Msgbox还不容易吗
======================================
更动MsgBox Button 标题(CBT Hook)
来源:cww
如果我们使用MsgBox,并设定其Buttons为vbYesNo,则出来的Button有 "是(Y)" 与 "否(N)"
,有没有可能变成"Yes(Y)"和 "No(N)"呢,或者有没有办法设定MsgBox的位置呢?如果我们
可以在MsgBox显示出来之前取得其hWnd,便可以进而更动其位置或Button的标题了;其实这
真的有些困难,因为MsgBox一呼叫,该Process便进入等待MsgBox结束的状态,连Timer都
不会动,所以想取得MsgBox的进一步资讯似乎很难。所以只好借重CBT Hook。
CBT Hook是做什麽用的呢?它是before activating, creating, destroying,
minimizing, maximizing, moving, or sizing a window; before completing a
system command; before removing a mouse or keyboard event from the
system message queue; before setting the keyboard focus; or before
synchronizing with the system message queue.在以上的状况发生之前拦截到讯息。
所以了,这就达到我们的目的 -->可在MsgBox display前取得其hWnd了。取得hWnd後再
使用EmunChildWindows()取得MsgBox的Control视窗,并取得"Button"型态者,进而判
断其Caption,并进行更改之。
这个程式重点在说明CBT Hook,我想没有人会为了更动MsgBox内的Button而如此做,应
会自行写一个Form,而来呼叫它,并可设定其位置。
'以下在Form
Private Sub Command1_Click()
Call EnableHook
MsgBoxTitle = "MyTitle5"
MsgBox "haha", vbYesNo, MsgBoxTitle
Call FreeHook
End Sub
'以下程式在.Bas
Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hHook As Long) As Long
Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lparam As Any) As Long
Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String) As Long
Declare Function EnumChildWindows Lib "user32" (ByVal hWndParent As Long, ByVal lpEnumFunc As Long, ByVal lparam As Long) As Long
Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Public Const HCBT_ACTIVATE = 5
Public Const WH_CBT = 5
Public hHook As Long
Public MsgBoxTitle as String
Public Sub EnableHook()
If hHook = 0 Then
hHook = SetWindowsHookEx(WH_CBT, AddressOf HookProc, 0, App.ThreadID)
End If
End Sub
Public Sub FreeHook()
If hHook <> 0 Then
Call UnhookWindowsHookEx(hHook)
hHook = 0
End If
End Sub
Public Function HookProc(ByVal nCode As Long, ByVal wParam As Long, ByVal lparam As Long) As Long
If nCode < 0 Then
HookProc = CallNextHookEx(hHook, nCode, wParam, lparam)
Exit Function
End If
'当MsgBox Activate之前去更改Button的标题
If nCode = HCBT_ACTIVATE Then
Dim str5 As String
Dim len5 As Long, i As Long
str5 = String(255, 0)
len5 = 256
i = GetWindowText(wParam, str5, len5)
str5 = Left(str5, InStr(1, str5, Chr(0)) - 1)
'如果Active Window上的标题是MsgBox上的标题
'
If str5 = MsgBoxTitle Then
'取得MsgBox上的所有子window
Call EnumChildWindows(wParam, AddressOf ChgButtonTitle, 0)
End If
End If
HookProc = 0 '令待完成的动作继续完成,若为1,则取消原本要完成的动作
End Function
Private Function ChgButtonTitle(ByVal hwnd As Long, ByVal lparam As Long) As Long
Dim clsName As String, len5 As Long, i As Long
Dim Title As String
If hwnd = 0 Then
ChgButtonTitle = 0
Exit Function
End If
clsName = String(255, 0)
len5 = 256
i = GetClassName(hwnd, clsName, 256)
clsName = Left(clsName, InStr(1, clsName, Chr(0)) - 1)
Title = String(255, 0)
i = GetWindowText(hwnd, Title, 256)
Title = Left(Title, InStr(1, Title, Chr(0)) - 1)
'找到Button型态的子Window,并更改其上的标题
If clsName = "Button" Then
If Title = "是(&Y)" Then
Call SetWindowText(hwnd, "Yes(&Y)")
Else
If Title = "否(&N)" Then
Call SetWindowText(hwnd, "No(&N)")
End If
End If
End If
ChgButtonTitle = 1 '表示继续找下一个子Window
End FunctionTop
4 楼hot1kang1(网站制作,系统开发,记得-http://3q2008.Com)回复于 2005-08-03 08:39:59 得分 0
谢谢你 . 但 我不是这个意思 :(
Private Sub Command1_Click()
af
MsgBox "aa"
End Sub
我的意思是 在AF里 就可以终止 事件 继续 进行下去 可以 终止 Command1_Click 下边的所有事件Top




