Like operator is fast and easy if you want to put flags in your command line:
Code:
Public Sub Main()
   MyCmdLine = Command()
   If MyCmdLine like "*/a*" then 'Do what you what
   If MyCmdLine like "*/b*" then 'Do what you what
   If MyCmdLine like "*/c*" then 'Do what you what
   If MyCmdLine like "*/d*" then 'Do what you what
   If MyCmdLine like "*/e*" then 'Do what you what
End Sub