嗨我想问是否可以让MsgBox没有任何按钮只与我的消息?也许是不使用MsgBox而向用户显示消息的另一种方法?Visual Basic Excel讯息框
回答
我通常不会回答没有显示足够研究的问题,但这超出了普通用户的范围。
是否有可能只有我的消息没有任何按钮的MsgBox?
Msgbox
不给你一个选项来隐藏它。但是我们可以通过子类化Excel应用程序和消息框来绕过。
是不使用MsgBox向用户显示消息的另一种方法?
是的,你有两种选择
- 使用自定义窗体或
- 子类,因为我已经证明下面
截图
代码
粘贴模块在该代码,并运行程序Sample
Option Explicit
Private 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
Private Declare Function UnhookWindowsHookEx Lib "user32" _
(ByVal hHook As Long) As Long
Private Declare Function CallNextHookEx Lib "user32" _
(ByVal hHook As Long, ByVal ncode As Long, _
ByVal WParam As Long, lparam As Any) As Long
Private Declare Function FindWindow Lib "user32" _
Alias "FindWindowA" (ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (_
ByVal hwndParent As Long, ByVal hwndChildAfter As Long, _
ByVal lpszClass As String, ByVal lpszCaption As String) As Long
Private Declare Function ShowWindow Lib "user32" _
(ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
Private Declare Function EnableWindow Lib "user32" _
(ByVal hwnd As Long, ByVal fEnable As Long) As Long
Private Declare Function GetClassName Lib "user32" _
Alias "GetClassNameA" (ByVal hwnd As Long, _
ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Private Declare Function SetWindowLong Lib "user32" _
Alias "SetWindowLongA" (ByVal hwnd As Long, _
ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function GetWindowLong Lib "user32" _
Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private 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
Private Declare Function GetCurrentThreadId Lib "kernel32"() As Long
Private hwndXLApp As Long
Private hwndMsgBox As Long
Private hwndMsgBoxBtn As Long
Private HookIt As Long
Private OldAppWinProc As Long
Private OldMBoxWinProc As Long
Private Const WH_CBT As Long = 5
Private Const HCBT_CREATEWND As Long = 3
Private Const GWL_STYLE As Long = -16
Private Const DS_NOIDLEMSG As Long = &H100&
Private Const GWL_WNDPROC As Long = (-4)
Private Const WM_ENTERIDLE As Long = &H121
Private Const WM_COMMAND As Long = &H111
Private Const WM_NCDESTROY As Long = &H82
Sub Sample()
hwndXLApp = FindWindow("XLMAIN", Application.Caption)
'~> Setup the hook to catch creation of messagebox
HookIt = SetWindowsHookEx(WH_CBT, AddressOf HookProc, 0, GetCurrentThreadId)
MsgBox ("Look Mommy, My button is missing!!!")
End Sub
Private Function HookProc(ByVal idHook As Long, ByVal WParam As Long, ByVal lparam As Long) As Long
Dim strBuffer As String
Dim RetVal As Long, curStyle As Long, NewStyle As Long
'~~> Check if a window is being created
If idHook = HCBT_CREATEWND Then
strBuffer = Space(256)
'~~> Check if it is a MSGBOX
RetVal = GetClassName(WParam, strBuffer, 256)
If Left(strBuffer, RetVal) = "#32770" Then
'~~> Handle of Msgbox
hwndMsgBox = WParam
'~~> We make the Msgbox Modeless so that we can use
'~~> ShowWindow API to hide the button
curStyle = GetWindowLong(WParam, GWL_STYLE)
NewStyle = curStyle And Not DS_NOIDLEMSG
SetWindowLong WParam, GWL_STYLE, NewStyle
'~~> Subclass Excel app to catch the WM_ENTERIDLE message and
OldAppWinProc = SetWindowLong(hwndXLApp, GWL_WNDPROC, AddressOf NewAppWindowProc)
'~~> Sub class the msgbox to catch the WM_NCDESTROY message to cleanup
OldMBoxWinProc = SetWindowLong(WParam, GWL_WNDPROC, AddressOf NewMsgBxWindowProc)
'~~> UnHook
UnhookWindowsHookEx HookIt
End If
End If
'~~> Call next hook
HookProc = CallNextHookEx(HookIt, idHook, ByVal WParam, ByVal lparam)
End Function
Private Function NewAppWindowProc(ByVal hwnd As Long, ByVal MSG _
As Long, ByVal WParam As Long, ByVal lparam As Long) As Long
On Error Resume Next
Select Case MSG
Case WM_ENTERIDLE
EnableWindow hwnd, 1
hwndMsgBoxBtn = FindWindowEx(hwndMsgBox, ByVal 0&, "Button", vbNullString)
ShowWindow hwndMsgBoxBtn, 0
'~~> Un SubClass Excel
SetWindowLong hwnd, GWL_WNDPROC, OldAppWinProc
End Select
'~~> Pass Intercepted Messages To The Original WinProc
NewAppWindowProc = CallWindowProc(OldAppWinProc, hwnd, MSG, WParam, lparam)
End Function
Private Function NewMsgBxWindowProc(ByVal hwnd As Long, ByVal MSG _
As Long, ByVal WParam As Long, ByVal lparam As Long) As Long
On Error Resume Next
Select Case MSG
Case WM_NCDESTROY, WM_COMMAND
SetWindowLong hwnd, GWL_WNDPROC, OldMBoxWinProc
End Select
NewMsgBxWindowProc = CallWindowProc(OldMBoxWinProc, hwnd, MSG, WParam, lparam)
End Function
让我微笑.. – brettdj
我想知道为什么:P –
聪明。我喜欢你做了“不可能”做的事情。我期待一个模式,异步,不可关闭的框(如进度对话框),也许有一个取消按钮,但没有确定。但是,聪明,令人印象深刻。 – GlennFromIowa
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它不可能有任何按钮消息框。请在发布问题之前进行搜索。这里是链接http://www.ozgrid.com/forum/showthread.php?t=36430 – DevelopmentIsMyPassion