如何自动关闭一个指定标题的Messagebox ?

[dragon525]

如何自动关闭一个指定标题的Messagebox ?
望指教！

[connonrocket]

up

[dragon525]

大家来帮帮忙啊！再up一下。
分不够再加，只要囊解决问题。

[OFFICE之门]

up

[koa3000]

把你的代码贴出来

[dragon525]

Const WM_CLOSE = &H10
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) 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 Sub command_click()
Dim hwnd As Long

Msgbox "xx",,"aa" '弹出msgbox

hwnd = FindWindow(vbNullString, "aa") 'Msgbox的标题为aa
SendMessage hwnd, WM_CLOSE, 0&, 0& '将它关闭

End Sub

[dragon525]

上面的代码为什么不行，而且Findwindow返回的句柄值为0，why???

[dsclub]

VB不是多线程的，Msgbox 没结束，就不会执行下面的语句，当然返回0了

[用户 昵称]

如果想自己结束自己的msgbox，需要替换窗口过程，上面的只能结束别人的msgbox，
替换自己的msgox过程可以参考这些代码
'form1
'在弹出模态对话框的同时设置他的位置
'本例子掩饰与父窗体左上角对齐
'根据BCB_FANS(四大名捕之追杀令)的bcb代码改写为vb的
'仅供参考
'附BCB_FANS源代码
'BCB_FANS (四大名捕之追杀令)
'当MessageBox对话框显示的时候，主窗口将失去焦点，知道了这一点，问题就很简单了。下面是我的C++Builder代码。
'
'//替换主窗口的窗口过程（我不知道VC怎样办到这一点，反正原理就是这样）
'
'void __fastcall TForm1::WndProc(Messages::TMessage &Message)
'{
' TForm::WndProc(Message);
'
' //失去焦点之前
' if(Message.Msg == WM_NCACTIVATE)
' {
' }
' //失去焦点之后
' else if(Message.Msg == WM_ACTIVATE)
' {
' if(LOWORD(Message.WParam) == WA_INACTIVE)
' {
' HWND hWnd;
' char ClassBuf[64];
'
' hWnd = (HWND)Message.LParam;
' GetClassName(hWnd,ClassBuf,sizeof(ClassBuf));
'
' //首先判断是否是MessageBox对话框，
' if(AnsiString(ClassBuf) == "#32770")
' {
' //再判断这个窗口是否是本身程序的窗口（因为别的程序弹出窗口时，你的主窗口也同样失去焦点）
' DWORD dwProcessID;
'
' GetWindowThreadProcessId(hWnd,&dwProcessID);
'
' if(dwProcessID == GetCurrentProcessId())
' {
' //移动窗口的位置
' MoveWindow(.......);//或者调用 SetWindowPos(...)
'
' //替换左边的标题栏图标(如果有的话)
' SetClassLong(hWnd,GCL_HICON,(long)Image1->Picture->Icon->Handle);
'
' //重新设置按钮的文本（比如把确定改为“OK 007”）
' HWND hTemp;
'
' hTemp = GetDlgItem(hWnd,1);
' SetWindowText(hTemp,"New Text For Button");
'
' //.........其他操作
' }
' }
' }
' }
'}

Option Explicit
Private Sub Form_Load()
On Error Resume Next

lhSysMenu = GetSystemMenu(hwnd, 0&)
lRet = AppendMenu(lhSysMenu, MF_SEPARATOR, 0&, vbNullString)
lRet = AppendMenu(lhSysMenu, MF_STRING, IDM_ABOUT, "About...")
Show

ProcOld = SetWindowLong(hwnd, GWL_WNDPROC, AddressOf WindowProc)
End Sub



Private Sub Form_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
Dim r As RECT
Dim p As POINTAPI
If Button = vbRightButton Then
GetCursorPos p
TrackPopupMenu lhSysMenu, 0, p.x, p.y, 0, Me.hwnd, r
End If
End Sub

Private Sub Form_Unload(Cancel As Integer)
SetWindowLong hwnd, GWL_WNDPROC, ProcOld
End Sub

[用户 昵称]

module1
Option Explicit
Public Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
Public Declare Function TrackPopupMenu Lib "user32" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal x As Long, ByVal y As Long, ByVal nReserved As Long, ByVal hwnd As Long, lprc As RECT) As Long
Public Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public 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
Public Declare Function AppendMenu Lib "user32" Alias "AppendMenuA" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As String) As Long
Public Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Public Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Public Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
Public Declare Function GetCurrentProcessId Lib "kernel32" () As Long
Public Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Public 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
Public Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Public Type POINTAPI
x As Long
y As Long
End Type
Public ProcOld As Long
Public Const TPM_LEFTALIGN = &H0&
Public Const WM_SYSCOMMAND = &H112
Public Const MF_SEPARATOR = &H800&
Public Const MF_STRING = &H0&
Public Const GWL_WNDPROC = (-4)
Public Const IDM_ABOUT As Long = 1010
Public Const WM_COMMAND = &H111
Public Const WM_ACTIVATE = &H6
Public Const WA_INACTIVE = 0

Public lhSysMenu As Long, lRet As Long

Public Function WindowProc(ByVal hwnd As Long, ByVal iMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Select Case iMsg
Case WM_SYSCOMMAND
If wParam = IDM_ABOUT Then
MsgBox "VB Move Messagebox demo", vbInformation, "About"
Exit Function
End If
Case WM_COMMAND
If wParam = IDM_ABOUT Then
MsgBox "VB Move Messagebox demo", vbInformation, "About"
Exit Function
Else
CallWindowProc ProcOld, hwnd, WM_SYSCOMMAND, wParam, lParam
WindowProc = 0
Exit Function
End If
Case WM_ACTIVATE
If wParam = WA_INACTIVE Then
Dim mywnd As Long
Dim buf As String * 64
Dim oldrect As RECT
GetWindowRect hwnd, oldrect
mywnd = lParam
GetClassName mywnd, buf, 64
If Mid(buf, 1, 6) = "#32770" Then
Dim processid As Long
GetWindowThreadProcessId mywnd, processid
If processid = GetCurrentProcessId() Then
SetWindowPos mywnd, 0, oldrect.Left, oldrect.Top, oldrect.Right - oldrect.Left, oldrect.Bottom - oldrect.Top, 0
End If
End If
End If
End Select
WindowProc = CallWindowProc(ProcOld, hwnd, iMsg, wParam, lParam)
End Function

[liushanyu]

学习，学习，再学习。

[dragon525]

有个控件，如果没注册的话，就会弹出一msgbox提示你没有注册。

我想在代码中：
让程序加载的时候，将它自动关闭，
但总是，不能成功，大家有什么好的建议吗？

[tinafang]

先用findwindow找到这个meessagebox
再用FindWindowEx找到确定按钮，给它发送WM_LMOUSEDOWN和WM_LMOUSEUP两个消息就可以了
也可以直接给messagebox发WM_CLOSE消息

[dragon525]

我开始也是这样写的，但是，我用Findwind返回 Messagebox的句柄值为0
而用其它的窗体（form )却能正确返回窗体句柄，why??

[liushanyu]

Private Const WM_CLOSE = &H10
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) 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 Declare Function EnableWindow Lib "user32" (ByVal hwnd As Long, ByVal fEnable As Long) As Long
Private Declare Function GetParent Lib "user32" (ByVal hwnd As Long) As Long

Private Sub Command1_Click()
Dim hwnd1 As Long
Dim hwnd2 As Long
' hwnd1 = FindWindow(vbNullString, "Form2")
hwnd2 = FindWindow(vbNullString, "Iloveyou") 'Msgbox
hwnd1 = GetParent(hwnd2) 'The Parent
SendMessage hwnd2, WM_CLOSE, 0&, 0&
EnableWindow hwnd1, 1 'Active the Parent
End Sub

[dragon525]

up

[dragon525]

楼上的代码和我写的差不多，试了试，还是不行啊？？

[dragon525]

up up