vbsを使用してYahooのレートを取得する

Function bytes2bstr(vin)
  strreturn = ""
  for i = 1 to lenb(vin)
    thischarcode = ascb(midb(vin,i,1))
    if thischarcode < &h80 then
      strreturn = strreturn & chr(thischarcode)
    else
      nextcharcode = ascb(midb(vin,i+1,1))
      strreturn = strreturn & chr(clng(thischarcode) * &h100 + cint(nextcharcode))
      i = i + 1
    end if
  next
  bytes2bstr = strreturn
End Function
Function GetURL(url)
  Set Retrieval = CreateObject("Microsoft.XMLHTTP")
  With Retrieval
    .Open "GET", url, False
    .Send
    GetURL = bytes2bstr(.responsebody)
    if len(.responsebody)<2 then
      strContent = "Remote communication failure! "
      Call LogToFile(strContent,1)
    response.end
    end if
  End With
  Set Retrieval = Nothing
End Function
'======== Above is the custom function ========
 
s1 = INPUTBOX("Original currency code: ","Please enter the original currency code","USD")
s2 = INPUTBOX("Target currency code: ","Please enter the target currency code","CNY")
s = s1&s2
url = "http://download.finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s="&s&"=x"
if s1<>"" and s2<>"" Then
  huilv = GetURL(url)
  MsgBox huilv
End if