object 
Required. Always the name of a FileSystemObject. 
filespec 
Required. The name of the file whose existence is to be determined. A complete path specification
(either absolute or relative) must be provided if the file isn't expected to exist in the current folder. 

Function ReportFileStatus(filespec)
   Dim fso, msg
   Set fso = CreateObject("Scripting.FileSystemObject")
   If (fso.FileExists(filespec)) Then
      msg = filespec & " exists."
   Else
      msg = filespec & " doesn't exist."
   End If
   ReportFileStatus = msg
End Function