slow Macro speed

[Lam Chop]

I have written a macro to import some large csv file and then split
them into different sheets.
However, I found my macro speed is very slow. Can anybody help?

Moreover, I found something very strange about my program. It seems it
is getting slower and slower once it starts. The time it takes to
process the same number of lines from the csv file is becoming longer
and longer.

Any suggestions?

Thanks a lot.

Man




Private Sub Workbook_Open()
'Dimension Variables
Dim ResultStr As String
Dim FileName As String
Dim FileNum As Integer
Dim Counter As Double
'Ask User for File's Name
FileName = InputBox("Please enter the Text File's name, e.g.
test.txt")
'Check for no entry
If FileName = "" Then End
'Get Next Available File Handle Number
FileNum = FreeFile()
'Open Text File For Input
Open FileName For Input As #FileNum
'Turn Screen Updating Off
Application.ScreenUpdating = False
'Create A New WorkBook With One Worksheet In It
Workbooks.Add template:=xlWorksheet
'Set The Counter to 1
Counter = 1
'Loop Until the End Of File Is Reached
Do While Seek(FileNum) <= LOF(FileNum)
'Display Importing Row Number On Status Bar
Application.StatusBar = "Importing Row " & _
Counter & " of text file " & FileName
'Store One Line Of Text From File To Variable
Line Input #FileNum, ResultStr
'Store Variable Data Into Active Cell
If Left(ResultStr, 1) = "=" Then
ActiveCell.Value = "'" & ResultStr
Else
ActiveCell.Value = ResultStr
End If

'For Excel versions before Excel 97, change 65536 to 16384
If ActiveCell.Row = 65536 Then


'Display Importing Row Number On Status Bar
Application.StatusBar = "Split Column A into different
columns, please Wait " & Counter


Columns("A:A").Select
Selection.TextToColumns Destination:=Range("A1"),
DataType:=xlDelimited, _
TextQualifier:=xlDoubleQuote, Comma:=True



'If On The Last Row Then Add A New Sheet
ActiveWorkbook.Sheets.Add
Else
'If Not The Last Row Then Go One Cell Down
ActiveCell.Offset(1, 0).Select
End If
'Increment the Counter By 1
Counter = Counter + 1
'Start Again At Top Of 'Do While' Statement
Loop


'Display splitting column A into smaller columns On Status Bar
Application.StatusBar = "Converting Column A into different
columns by commas, Please wait(the last bit)."

Columns("A:A").Select
Selection.TextToColumns Destination:=Range("A1"),
DataType:=xlDelimited, _
TextQualifier:=xlDoubleQuote, Comma:=True


'Close The Open Text File
Close
'Remove Message From Status Bar
Application.StatusBar = False

Workbooks("splitter.xls").Close SaveChanges:=False

End Sub