Does VBA support multi-thread?

[palo]

I have a workbook with too many rows and columns of data. My macro run very
slowly. Can I use multithread in VBA? Thanks

 

[RB Smissaert]

Unless you want to get into some seriously complicated programming (and a
lot of trouble) you can't.

RBS

 

[royUK]

I have a workbook with too many rows and columns of data. My macro ru
very
slowly. Can I use multithread in VBA? Thanks

How many Columns & rows are you using.

One thing that many users do that slows code down is to continuall
Select and/or activate ranges. This is not usually necessary.

Also, check if your code contains Loops that could possibly b
unnecessar

 

[Joel]

There are ways of speeding up the code. Post code if possible

Some tricks are to turn off screen up[dating and turn off events

Application.ScreenUpdating = False
Application.EnableEvents = False

If yu are deleting rows delete all the rows in one instruction rather than
one line at a time. I usually mark the rows I want to delete and then use
the mark to sort the rows I want to delete so the are all adjacent. There
are other tricks but without seeing the code I can't determine what is
slowing down your code.

 

[palo]

If VB6 support multithread, Can I to associate VB6 and VBA?

 

[palo]

Thank you very much. I want to get the information of multithread in VBA. Can
I do this with VB6?

 

[Niek Otten]

I think you're on the wrong track in trying to get multithreading to work.
The reason for poor performance is in the code, not in the number of
processors used.

Post your code. I'm sure you'll get good advice on how to improve
performance.

--
Kind regards,

Niek Otten
Microsoft MVP - Excel

Thank you very much. I want to get the information of multithread in VBA.
Can
I do this with VB6?

There are ways of speeding up the code. Post code if possible

Some tricks are to turn off screen up[dating and turn off events

Application.ScreenUpdating = False
Application.EnableEvents = False

If yu are deleting rows delete all the rows in one instruction rather
than
one line at a time. I usually mark the rows I want to delete and then
use
the mark to sort the rows I want to delete so the are all adjacent.
There
are other tricks but without seeing the code I can't determine what is
slowing down your code.

 

[Rick Rothstein]

I've never tried any of this myself, so I don't know how easy or hard it
might be, nor whether the principles can be extended to VBA or not, but here
is a link about implementing multithreading in VB5/6 from one of the most
credible authors of API techniques; perhaps you can make use of the material
he presents in it, but make sure to read the "Sequel #1- Regarding VB6"
section at the end of the article (actually, I think you should read it
first, before you get started)....

http://www.freevbcode.com/ShowCode.Asp?ID=1287

--
Rick (MVP - Excel)

Thank you very much. I want to get the information of multithread in VBA.
Can
I do this with VB6?

There are ways of speeding up the code. Post code if possible

Some tricks are to turn off screen up[dating and turn off events

Application.ScreenUpdating = False
Application.EnableEvents = False

If yu are deleting rows delete all the rows in one instruction rather
than
one line at a time. I usually mark the rows I want to delete and then
use
the mark to sort the rows I want to delete so the are all adjacent.
There
are other tricks but without seeing the code I can't determine what is
slowing down your code.

 

[palo]

This is my code. The code run with 3000 file word in Foldername-folder:
Option Explicit
Sub GetDoc_Properties()
Dim FolderName As String, wbName As String
Dim rw As Integer
Dim lrow As Long, lrow2 As Long
Dim ObjWord As Object
Dim DoSubj As String, DoTit As String, DoAut As String
Dim sDate
On Error Resume Next
lrow = ActiveSheet.Range("B65000").End(xlUp).Row
ActiveSheet.Range("A9:G" & lrow + 9).ClearContents
FolderName = Cells(4, 5)
wbName = Dir(FolderName & "\" & "*.doc")
Application.ScreenUpdating = False
rw = 9
Set ObjWord = CreateObject("Word.Application")
While wbName <> ""
With ObjWord
.Visible = True
.Documents.Open (FolderName & "\" & wbName)
DoSubj = .ActiveDocument.BuiltinDocumentProperties(2)
DoTit = .ActiveDocument.BuiltinDocumentProperties(1)
DoAut = .ActiveDocument.BuiltinDocumentProperties(3)
.Documents(wbName).Close
End With
Cells(rw, 1) = rw - 8
Cells(rw, 2).Value = DateSerial(2008, Mid(wbName, 4, 2), Mid(wbName, 1,
2))
Cells(rw, 3).Value = Mid(wbName, 7, Len(wbName) - 10)
Cells(rw, 4).Value = DoSubj
sDate = Split(DoTit, " ")
Cells(rw, 6).Value = DateSerial(sDate(2), sDate(1), sDate(0))
Cells(rw, 5).Value = DoAut
Cells(rw, 7).Value = Cells(rw, 6).Value - Cells(rw, 2).Value
rw = rw + 1
wbName = Dir
Wend
Cells(5, 5) = rw - 9
ObjWord.Quit
lrow2 = Range("B65000").End(xlUp).Row
Range("B9:H" & lrow2).Select
Selection.Sort Key1:=Range("B9"), Order1:=xlAscending, Header:=xlNo, _
OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom, _
DataOption1:=xlSortNormal
Cells(1, 1).Select
If rw = 9 Then
MsgBox "Duong dan hoac tap tin khong ton tai ", , "Thong bao"
End If
Application.ScreenUpdating = True
End Sub

 

[Jim Cone]

The Word application does not need to be visible while running the code.
Also, the "SaveChanges" option should be used for both the Close and
Quit statements... SaveChanges:=wdDoNotSaveChanges

However, your best bet may be to read the document properties
without opening the Word files using the Dsofile.dll from Microsoft.
See Chip Pearson's "Returning Property Values From a Closed File" here...
http://www.cpearson.com/excel/DocProp.aspx
and also...
http://support.microsoft.com/kb/224351/en-us
--
Jim Cone
Portland, Oregon USA


"palo"
wrote in message
This is my code. The code run with 3000 file word in Foldername-folder:
-snip-

 

[Jim Cone]

Actually that should be... SaveChanges:=0