我正在编写一个脚本,该脚本循环遍历一个文件夹并根据某些条件创建图形,然后将其导出到powerpoint。目前,创建130个图形需要290秒,其中286个由PowerPoint使用。我怀疑这的主要原因是无法关闭powerpoint的屏幕更新。我尝试使用此处http://skp.mvps.org/ppt00033.htm的代码来解决此问题。但是,我没有注意到任何影响。虽然我可以alt-tab键并将powerpoint保留在后台,但是当切换到Powerpoint时,将显示所有更改,您基本上可以看到它如何减慢程序速度。有人知道我如何使用此代码吗?应该在类模块中,还是应该做其他事情或者我做错了什么?以下是我借用的代码片段以及如何尝试调用它的示例:
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,此功能尚不可用,现在我需要您的帮助!
假设将代码放在名为Class1的类模块中,则可以在主代码中创建一个实例,如下所示:
Dim myClass1 as Class1
Set myClass1 = New Class1
Class1.ScreenUpdating = False
编辑:只需使用最初编写的代码即可:无需添加任何内容。坏消息是,它对我在PPT 2013中进行测试的速度没有任何影响。尽管将其设置为False,也可以验证其是否有效。
类模块cScreenUpdating ...
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.
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, _
ByVal lpWindowName As Long) As Long
' Use LockWindowUpdate to prevent/enable window refresh
Private Declare Function LockWindowUpdate Lib "user32" _
(ByVal hwndLock As Long) As Long
' Use UpdateWindow to force a refresh of the PowerPoint window
Private 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", "15"
' 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
' window was not found...
Err.Raise Number:=vbObjectError + ERR_NO_WINDOW_HANDLE, _
Description:="Unable to get the PowerPoint Window handle"
Exit Property
End If
'Attempt to lock the window
If LockWindowUpdate(hWnd) = 0 Then
' attempt failed...
Err.Raise Number:=vbObjectError + ERR_WINDOW_LOCK_FAIL, _
Description:="Unable to set a PowerPoint window lock"
Exit Property
End If
Else 'State = True
'Unlock the Window to refresh
LockWindowUpdate (0&)
UpdateWindow (hWnd)
hWnd = 0
End If
End Property
用法示例...
Set appObject = New cScreenUpdating
appObject.ScreenUpdating = False
' code here
appObject.ScreenUpdating = True
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