With the function below you can create new workbooks with up to 255 new worksheets.
You can use the macro like this if you want to create a new workbook with 10 worksheets:
Set wb = NewWorkbook(10)
Function NewWorkbook(wsCount As Integer) As Workbook
' creates a new workbook with wsCount (1 to 255) worksheets
Dim OriginalWorksheetCount As Long
Set NewWorkbook = Nothing
If wsCount < 1 Or wsCount > 255 Then Exit Function
OriginalWorksheetCount = Application.SheetsInNewWorkbook
Application.SheetsInNewWorkbook = wsCount
Set NewWorkbook = Workbooks.Add
Application.SheetsInNewWorkbook = OriginalWorksheetCount
End Function