How I can Set file Downloding path

[HarishChand]

str sfile="$desktop$\Abc.xls"

str sheet="Sheet1"
;;Works the Magic...
Excel.Application app._create
Excel.Workbook book=app.Workbooks.Open(_s.expandpath(sfile))
ExcelSheet es.ws=book.Worksheets.Item(sheet)

es.ws.Range("m").Delete
es.ws.Range("k:k").Delete
es.ws.Range("c:e").Delete
es.ws.Range("a:a").Delete

str editFile ="Edit"

str directory ="$desktop$/Excel/"

directory.from(editFile ".xls") ;; NOT WORKING Original file is "$desktop$\Abc.xls"
es.ws.SaveAs(directory) ;; I want Edit copy in $desktop$/Excel/Edit.xls" Folder


;;Saves the Excel sheet
book.Save
;;Closes the Excel
book.Close