文章摘要
This article introduces two custom functions for handling binary data and retrieving URLs. The `bytes2bstr` function converts binary data into a string, using different methods based on character codes. The `GetURL` function utilizes Microsoft.XMLHTTP to fetch web content and processes the response body. The article also demonstrates how to input currency codes and construct a URL to retrieve exchange rate data, ultimately displaying the results.
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=”远程通讯故障！”
Call LogToFile(strContent,1)
response.end
end if
End With
Set Retrieval=Nothing
End Function
‘========以上为自定义函数========s1=INPUTBOX(“原始货币代码：”,”请输入原始货币代码”,”USD”)
s2=INPUTBOX(“目标货币代码：”,”请输入目标货币代码”,”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