窗体内查找webbrowser控件的句柄

'-Api
  Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong 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
  Public Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, ByVal wCmd 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 Const GW_CHILD As Long = 5
  Public Const GW_HWNDNEXT As Long = 220 '---找自身窗体Webbrowser的句柄-------------------------------------------
Public Function FindWebPage(ByVal hParentWnd As Long) As Long

    Dim strClassName As String * 30
    Dim hTempWnd As Long
    hTempWnd = GetWindow(hParentWnd, GW_CHILD)
    Do While (hTempWnd <> 0)
        strClassName = ""
        GetClassName hTempWnd, strClassName, 30
        Debug.Print strClassName
        If Left(strClassName, Len("Internet Explorer_Server")) = "Internet Explorer_Server" Then
            WebhWnd = hTempWnd '--find
            FindWebPage = WebhWnd
            Exit Function
        End If
        FindWebPage = FindWebPage(hTempWnd)     '没找到,继续
        If FindWebPage <> 0 Then
            Exit Function
        End If
        hTempWnd = GetWindow(hTempWnd, GW_HWNDNEXT)
        
    Loop
End Function