vbs调用ie浏览器

vbs脚本调用ie浏览器，遇到ie8后，不能置顶ie窗口，请问是为什么
代码如下

MaxBrowserWindow("www.baidu.com")
Sub MaxBrowserWindow(URL)
 With CreateObject("InternetExplorer.Application")
    dim ws
         set ws = CreateObject("Wscript.Shell")
    ws.AppActivate "Internet Explorer"
         .Navigate URL
         While .Busy
         wend
         .Left = 0
         .Top = 0
         .Width = .document.parentWindow.screen.availWidth
         .Height = .document.parentWindow.screen.availHeight
         .Visible = True
 End With
End Sub

“Devil组”引证GPT后的撰写：、

• 在IE8浏览器中，应该无法通过调用WSH的AppActivate方法使IE窗口成为活动窗口。这可能是由于IE8中的安全限制或Windows用户账户控制（UAC）的设置引起的。
  用Windows API函数SetForegroundWindow来使IE窗口成为前台窗口，并调用SetWindowPos函数来将IE窗口置顶。

下面是一个示例代码，使用了Windows API函数：

MaxBrowserWindow("www.baidu.com")

Sub MaxBrowserWindow(URL)
  Dim ie
  Set ie = CreateObject("InternetExplorer.Application")
  ie.Navigate URL
  ie.Visible = True
  
  ' wait for the page to load
  Do While ie.Busy Or Not ie.ReadyState = 4
    WScript.Sleep 100
  Loop

  ' set window position and size
  ie.Left = 0
  ie.Top = 0
  ie.Width = ie.document.parentWindow.screen.availWidth
  ie.Height = ie.document.parentWindow.screen.availHeight
  
  ' bring the window to the foreground and set it as topmost
  Dim hwnd
  hwnd = ie.HWND
  SetForegroundWindow hwnd
  SetWindowPos hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE

End Sub

' Windows API declarations
Private Declare Function SetForegroundWindow Lib "user32" (ByVal hwnd As Long) As Long
Private 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

Private Const HWND_TOPMOST = -1
Private Const SWP_NOMOVE = &H2
Private Const SWP_NOSIZE = &H1

此代码需要在管理员权限下运行才能使用Windows API函数。