第一程序是一个叫BackForm 的Form窗口,仅做背景,无任何内容,已用Api函数 SetWindowPos 设置为TopMost窗口,窗口属性 Enabled=False。
第二程序是一个叫ShowForm的Form窗口,窗口上放一个叫"Clock"的自制ACTIVEX控件,该控件是一个模拟时钟。控件"Clock"的属性Enabled=False,AutoRedraw=False(设置成True错误也一样),CanGetFocus=False,该自制控件没有使用Paint事件。ShowForm窗口的属性Enabled=False,并且已用API函数SetWindowPos 设置为TopMost.编译"ShowForm"窗口为"ShowForm.exe".
在第一程序BackForm的Load事件中用 Shell函数 "Shell ShowForm.exe"显示SowForm窗口,希望窗口"ShowForm"一直显示在窗口"BackForm"之上.
问题是:BackForm窗口程序执行后,一用鼠标点击SHowForm窗口,ShowForm窗口立刻被BackForm窗口盖掉.!!如果删掉"Clock"控件或更换"Clock"控件成任一微软的现成控件,则同样用鼠标点击ShowForm窗口,ShowForm仍然显示在BackForm之上,执行正常,说明问题肯定出现在自制的ACTIVEX控件上,我的ACTIVEX控件仅用一个TIMER定时器画时钟指针,请问我的ActiveX控件到底错在那些地方??
第二程序是一个叫ShowForm的Form窗口,窗口上放一个叫"Clock"的自制ACTIVEX控件,该控件是一个模拟时钟。控件"Clock"的属性Enabled=False,AutoRedraw=False(设置成True错误也一样),CanGetFocus=False,该自制控件没有使用Paint事件。ShowForm窗口的属性Enabled=False,并且已用API函数SetWindowPos 设置为TopMost.编译"ShowForm"窗口为"ShowForm.exe".
在第一程序BackForm的Load事件中用 Shell函数 "Shell ShowForm.exe"显示SowForm窗口,希望窗口"ShowForm"一直显示在窗口"BackForm"之上.
问题是:BackForm窗口程序执行后,一用鼠标点击SHowForm窗口,ShowForm窗口立刻被BackForm窗口盖掉.!!如果删掉"Clock"控件或更换"Clock"控件成任一微软的现成控件,则同样用鼠标点击ShowForm窗口,ShowForm仍然显示在BackForm之上,执行正常,说明问题肯定出现在自制的ACTIVEX控件上,我的ACTIVEX控件仅用一个TIMER定时器画时钟指针,请问我的ActiveX控件到底错在那些地方??
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As Long, ByVal lpWindowName As Long) As Long
Private Declare Function GetParent Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, ByVal wCmd As Long) As Long
Private Declare Function LockWindowUpdate Lib "user32" (ByVal hwndLock As Long) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long
Private Declare Function DestroyWindow Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function Putfocus Lib "user32" Alias "SetFocus" (ByVal hwnd As Long) As Long
Const GW_HWNDNEXT = 2
Dim mWnd As Long
Function InstanceToWnd(ByVal target_pid As Long) As Long
Dim test_hwnd As Long, test_pid As Long, test_thread_id As Long
'Find the first window
test_hwnd = FindWindow(ByVal 0&, ByVal 0&)
Do While test_hwnd <> 0
'Check if the window isn't a child
If GetParent(test_hwnd) = 0 Then
'Get the window's thread
test_thread_id = GetWindowThreadProcessId(test_hwnd, test_pid)
If test_pid = target_pid Then
InstanceToWnd = test_hwnd
Exit Do
End If
End If
'retrieve the next window
test_hwnd = GetWindow(test_hwnd, GW_HWNDNEXT)
Loop
End Function
Private Sub Form_Load()
Dim Pid As Long
'Lock the window update
LockWindowUpdate GetDesktopWindow
'Execute notepad.Exe
Pid = Shell("c:\windows\notepad.exe", vbNormalFocus)
If Pid = 0 Then MsgBox "Error starting the app"
'retrieve the handle of the window
mWnd = InstanceToWnd(Pid)
'Set the notepad's parent
SetParent mWnd, Me.hwnd
'Put the focus on notepad
Putfocus mWnd
'Unlock windowupdate
LockWindowUpdate False
End Sub
Private Sub Form_Unload(Cancel As Integer)
'Unload notepad
DestroyWindow mWnd
'End this program
TerminateProcess GetCurrentProcess, 0
End Sub
ShowForm.enabled=true