I have a workbook with a button that launches a filedialog, after opening the new workbook I want to be able to run a set of macro immediately. The code that I use for opening the file is:
Sub openFile()
Dim SelectedFileItem As String
Dim fDialog As FileDialog
Set fDialog = Application.FileDialog(msoFileDialogOpen)
    With fDialog
    'Custom dialog title
    .Title = "Seleccione uno o varios archivos"
    .AllowMultiSelect = False
    'Set the file path
    .InitialFileName = "C:\Users\Public"
    'Filters for file types allowed
    .Filters.Clear
    .Filters.Add "Excel files", "*.xlsx"
    If .Show = -1 Then
    'if user clicks OK
    SelectedFileItem = .SelectedItems(1)
    'Open the selected file
    Workbooks.Open (SelectedFileItem)
    Else
    'if user clicks Cancel
    End If
    End With
End Sub
and the set of macros I want to run immediately after selecting and opening the new workbook is:
Sub ReemplazarDotComma()
Dim ws_num As Integer
ws_num = ThisWorkbook.Worksheets.Count
Dim i As Integer
For i = 1 To ws_num
    ThisWorkbook.Worksheets(i).Activate
    Range("Y2:Y70").Select
        ActiveWindow.SmallScroll Down:=-60
        Selection.Replace What:=".", Replacement:=",", LookAt:=xlPart, _
        SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
        ReplaceFormat:=False
Next
End Sub
Sub Convertir_Variant()
Dim ws_num As Integer
ws_num = ThisWorkbook.Worksheets.Count
Dim i As Integer
Dim j As Integer
For i = 1 To ws_num
    ThisWorkbook.Worksheets(i).Activate
    For j = 2 To 70
        Cells(j, 25) = ConvertToVariant(Cells(j, 25))
    Next
Next
End Sub
 
    