Doesn't seem to work reliably.

I tried invalid URL first, then valid URL, then http://stackoverflow.com/questions/161738.com (invalid) and it didn't give me any message.

>

>local m.url,m.Result
>m.url="https://www.levelextreme.com/ViewPageGenericLogin.aspx"
>
>DECLARE INTEGER InternetCheckConnection IN wininet   STRING lpszUrl, INTEGER dwFlags, INTEGER dwReserved 
>#DEFINE FLAG_ICC_FORCE_CONNECTION  1 
>
>LOCAL llResult 
>m.lResult = (InternetCheckConnection(m.URL, FLAG_ICC_FORCE_CONNECTION, 0) = 1)
>if m.lResult=.t.
>messagebox("Valid URL",0+32+4096,'',1000)
>else
>messagebox("inValid URL",0+32+4096,'',1000)
>endi
>

>
>see also this:http://www.sourcecodester.com/tutorials/c/7296/url-validation-using-c.html
>if you can translate to vfp (regExp)