关闭Powerpoint的screenupdating

我正在编写一个循环文件​​夹的脚本,并根据某些条件创建图形,然后将这些图形导出到powerpoint.目前,创建130个图表需要290秒,其中286个由powerpoint使用.我怀疑这是一个主要原因是无法关闭powerpoint的screenupdd.我尝试使用http://skp.mvps.org/ppt00033.htm中的代码来解决这个问题.但是,我没有注意到任何影响.虽然我可以在后台使用alt-tab并保持powerpoint,但当切换到Powerpoint时,所有的更改都会显示出来,你基本上可以看到它如何减慢程序的速度.有谁知道我如何使用这段代码？它应该是一个类模块,我应该做什么或者我做错了什么？下面是我借用的代码片段以及我尝试调用它的示例:

Option Explicit
' UserDefined Error codes
Const ERR_NO_WINDOW_HANDLE As LOng= 1000
Const ERR_WINDOW_LOCK_FAIL As LOng= 1001
Const ERR_VERSION_NOT_SUPPORTED As LOng= 1002

' API declarations for FindWindow() & LockWindowUpdate()
 ' Use FindWindow API to locate the PowerPoint handle.
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As Long) As Long

' Use LockWindowUpdate to prevent/enable window refresh
Declare Function LockWindowUpdate Lib "user32" (ByVal hwndLock As Long) As Long

' Use UpdateWindow to force a refresh of the PowerPoint window
Declare Function UpdateWindow Lib "user32" (ByVal hwnd As Long) As Long

Property Let ScreenUpdating(State As Boolean)

Static hwnd As Long
Dim VersionNo As String
' Get Version Number
    If State = False Then
        VersiOnNo= Left(Application.Version, InStr(1, Application.Version, ".") - 1)
        'Get handle to the main application window using ClassName
        Select Case VersionNo
        Case "8"
        ' For PPT97:
            hwnd = FindWindow("PP97FrameClass", 0&)
        Case "9"
        ' For PPT2K:
            hwnd = FindWindow("PP9FrameClass", 0&)
        Case "10"
        ' For XP:
        hwnd = FindWindow("PP10FrameClass", 0&)
        Case "11"
        ' For 2003:
        hwnd = FindWindow("PP11FrameClass", 0&)
        Case "12"
        ' For 2007:
        hwnd = FindWindow("PP12FrameClass", 0&)
        Case "14"
        ' For 2010:
        hwnd = FindWindow("PPTFrameClass", 0&)
        Case Else
        Err.Raise Number:=vbObjectError + ERR_VERSION_NOT_SUPPORTED, _
        Description:="Newer version."
        Exit Property
        End Select

        If hwnd = 0 Then
        Err.Raise Number:=vbObjectError + ERR_NO_WINDOW_HANDLE, _
        Description:="Unable to get the PowerPoint Window handle"
        Exit Property
        End If

        If LockWindowUpdate(hwnd) = 0 Then
                Err.Raise Number:=vbObjectError + ERR_WINDOW_LOCK_FAIL, _
        Description:="Unable to set a  PowerPoint window lock"
        Exit Property
        Else
        LockWindowUpdate (hwnd)
        End If

    Else
    'Unlock the Window to refresh
    LockWindowUpdate (0&)
    UpdateWindow (hwnd)
    hwnd = 0
   End If
End Property


Sub TestSub()
' Lock screen redraw
 If ScreenUpdatingOff = True Then ScreenUpdating = False

 ' --- Loop through charts in Excel and export them to Powerpoint
 ' Redraw screen again
ScreenUpdating = True

End Sub

提前谢谢了.很奇怪,这个功能并不容易获得,现在我需要你的帮助!