Option Explicit
Sub Tst()
Application.DisplayAlerts = False
With ActiveWorkbook
.SaveAs Filename:=ThisWorkbook.Path & "\" & "Classeur1.xlsm", FileFormat:=xlOpenXMLWorkbookMacroEnabled
.SaveAs Filename:=ThisWorkbook.Path & "\" & "Classeur1.xlsb", FileFormat:=xlExcel12
.SaveAs Filename:=ThisWorkbook.Path & "\" & "Classeur1.xlsx", FileFormat:=xlOpenXMLWorkbook
End With
Application.DisplayAlerts = True
End Sub