Excel VBA Code Save and Close - vba

Question

I want to loop through 2000 csv files, convert them to xls, make changes to the spreadsheet.
I can't work out how to save and close the workbook before moving on to the next.
I tried the following at the end of the script.
Application.ActiveWindow.Close SaveChanges:=False
ActiveWorkbook.Close SaveChanges:=False
I get a Minor loss of fidelity message.
The full code
Sub batchconvertcsvxls()
Dim wb As Workbook
Dim strFile As String, strDir As String, strOut_Dir As String, myNewFileName As String
strDir = "C:\csv\" 'location of csv files
strOut_Dir = "C:\converted\" 'location of xls files
strFile = Dir(strDir & "*.csv")
Do While strFile <> ""
Set wb = Workbooks.Open(filename:=strDir & strFile, Local:=True)
With wb
.SaveAs strOut_Dir & Replace(wb.Name, ".csv", ".xls"), 56
.Close True
End With
Set wb = Nothing
Set wb = Workbooks.Open(filename:=strOut_Dir & Replace(strFile, ".csv", ".xls"))
Rows("1:1").Select
With Selection.Interior
.Pattern = xlSolid
.PatternColorIndex = xlAutomatic
.ThemeColor = xlThemeColorDark2
.TintAndShade = -0.249977111117893
.PatternTintAndShade = 0
End With
Selection.RowHeight = 60
Selection.ColumnWidth = 30
With Selection
.HorizontalAlignment = xlGeneral
.VerticalAlignment = xlBottom
.WrapText = True
.Orientation = 0
.AddIndent = False
.IndentLevel = 0
.ShrinkToFit = False
.ReadingOrder = xlContext
.MergeCells = False
End With
With Selection
.HorizontalAlignment = xlGeneral
.VerticalAlignment = xlTop
.WrapText = True
.Orientation = 0
.AddIndent = False
.IndentLevel = 0
.ShrinkToFit = False
.ReadingOrder = xlContext
.MergeCells = False
End With
Columns("E:E").Select
With Selection
.HorizontalAlignment = xlLeft
.Orientation = 0
.AddIndent = False
.IndentLevel = 0
.ShrinkToFit = False
.ReadingOrder = xlContext
.MergeCells = False
End With
Cells.Select
Selection.AutoFilter
Range("E2").Select
ActiveWindow.FreezePanes = True
For i = 1 To ActiveSheet.UsedRange.Columns.Count
DataFound = False
j = 2
While DataFound = False And j <= ActiveSheet.UsedRange.Rows.Count
If Cells(j, i).Value <> "" Then
DataFound = True
End If
j = j + 1
Wend
If DataFound = False Then
Columns(i).Hidden = True
End If
Next
strFile = Dir
Application.ActiveWindow.Close SaveChanges:=True ActiveWorkbook.Close
SaveChanges:=False
Loop
End Sub

Answer 1

You can try wb.Close SaveChanges:=False since you have set the workbook as wb that may get it to close without the message box popping up.
Also you can try Application.DisplayAlerts = False(this goes at the start of your code), it stops most types of messages popping up (there are some errors that cannot be stopped though(I dont have a list to hand but "out of memory" is an error that cannot be prevented for instance)).
I'll look into it a bit more sine im doing this off the top of my head and update the post if I get any more