run macro from command prompt

hi everyone,
i want to run my code in excel vba by using cmd (command prompt).
i've tried some code that i get from the internet but it still didn't work.
is it really possible?
here is my macro

sub a()
    Msgbox ("ABCD")
end sub

And here is my code

RunMacro
Sub RunMacro() 
  Dim xl
  Dim xlBook      
  Dim sCurPath
  Set xl = CreateObject("Excel.application")
  Set xlBook = xl.Workbooks.Open("E:\z.xlsm", 0, True)
  xl.Application.Visible = False
  xl.DisplayAlerts = False    
  xl.Application.run "z.xlsm!Module.RunMacro"
  xl.ActiveWindow.close
  xl.Quit
  Set xlBook = Nothing
  Set xl = Nothing
End Sub

Thanks