"Howard Kaikow" wrote in message
...
When you run the code, are you running via VB 6, or are you running in
Excel?


In Word. I 've just repeated in VB6 and got similar timings. However, seems
it depends on what you are doing as to whether there's a significant speed
gain with screenupdating disabled when excel is not visible.

Try the following in Word or VB6 and have a cup of coffee, or even a glass
of OJ. For me a significant saving with bAutoFitTest = false but not much in
the second loop when bAutoFitTest = True

Option Explicit
Sub xlScrnUpdate()
Dim bAutoFitTest As Boolean
Dim i As Long
Dim t As Single
Dim oRng As Object
Dim oWS As Object
Dim xlApp As Object

Set xlApp = CreateObject("excel.application")
Set oWS = xlApp.workbooks.Add.worksheets(1)

For i = 0 To 1

bAutoFitTest = i = 1
Debug.Print bAutoFitTest

xlApp.Visible = False
xlApp.ScreenUpdating = True
testStuff oWS, bAutoFitTest

xlApp.ScreenUpdating = False
testStuff oWS, bAutoFitTest

xlApp.Visible = True
xlApp.ScreenUpdating = True
testStuff oWS, bAutoFitTest

xlApp.ScreenUpdating = False
testStuff oWS, bAutoFitTest
Next
xlApp.ScreenUpdating = True

Stop

oWS.Parent.Close 0
Set oWS = Nothing
xlApp.Quit
Set xlApp = Nothing
Unload Me

End Sub

Sub testStuff(oWS As Object, bColWidth As Boolean)
Dim i As Long, qty As Long
Dim t As Single

If bColWidth Then qty = 2000 Else qty = 10000

oWS.Cells.clearcontents
With oWS.Columns(1)
.columnwidth = .Parent.standardwidth
t = Timer
For i = 1 To qty
.Cells(i, 1) = i & " some text longish text " & i
If bColWidth Then
.entirecolumn.AutoFit
End If
Next
End With
t = Timer - t
Debug.Print t
End Sub

Private Sub Form_Load()
xlScrnUpdate
End Sub

Regards,
Peter T