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Following are ten ways to help keep your Excel macros running at their optimum performance level.Did you know that each time a cell that affects any formula in your spreadsheet is changed or manipulated, Excel recalculates the entire worksheet?Declare Function Find Window Lib "user32" Alias "Find Window A" _ (By Val lp Class Name As String, _ By Val lp Window Name As Long) As Long ' Use Lock Window Update to prevent/enable window refresh Declare Function Lock Window Update Lib "user32" _ (By Val hwnd Lock As Long) As Long ' Use Update Window to force a refresh of the Power Point window Declare Function Update Window Lib "user32" (By Val hwnd As Long) As Long Property Let Screen Updating(State As Boolean) Static hwnd As Long Dim Version No As String ' Get Version Number If State = False Then Version No = Left(Application. Version, ".") - 1) ' Get handle to the main application window using Class Name Select Case Version No Case "8" ' For PPT97: hwnd = Find Window("PP97Frame Class", 0&) Case "9" ' For PPT2K: hwnd = Find Window("PP9Frame Class", 0&) Case "10" ' For XP: hwnd = Find Window("PP10Frame Class", 0&) Case "11" ' For 2003: hwnd = Find Window("PP11Frame Class", 0&) Case "12" ' For 2007: hwnd = Find Window("PP12Frame Class", 0&) Case "14" ' For 2010: hwnd = Find Window("PPTFrame Class", 0&) Case "15" ' For 2013: hwnd = Find Window("PPTFrame Class", 0&) Case Else Err.Raise Number:=vb Object Error ERR_VERSION_NOT_SUPPORTED, _ Description:="Newer version." Exit Property End Select If hwnd = 0 Then Err.When the data refresh runs, all images dissappear on the screen, and even the color format of the cells changes from grey to white.Essentially, it's a blank white spreadsheet which appears for the duration of the refresh.Raise Number:=vb Object Error ERR_NO_WINDOW_HANDLE, _ Description:="Unable to get the Power Point Window handle" Exit Property End If If Lock Window Update(hwnd) = 0 Then Err.
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When discussing macros, the word performance is usually synonymous with speed.
Speed is how quickly your VBA procedures perform their intended tasks.
Place Excel into manual calculation mode, run your code, and then switch back to automatic calculation mode.
Setting the calculation mode back to xl Calculation Automatic will automatically trigger a recalculation of the worksheet, so there is no need to press the F9 key after your macro runs.
Is there a way to refresh the userform without turning the screenupdating back on (because the user cannot see what is happening behind the scenes.