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Add Download Ability to Your App in 2 Seconds by craigsboyd
Posted: 6 Jul 03 (Edited 18 Feb 05)

Slighthaze = NULL

CODE

I stumbled on the below method and couldn't believe how simple it was.  Download with progress indication and everything.  I have made some revisions since this FAQ was first posted, thanks to machele for asking all the right questions.
 
This program can handle username/password and unsafe characters in the URL.  An example of a fullblown URL for this program would be something like sURLandFile = "ftp://username:password@domain/Some Path/Some File I Want.zip" <-- note that the path and filename have spaces in them (space is an unsafe URL character that needs to be turned into escape sequences - see HandleUnsafeChars function below)

***(Cut-n-paste the code into a prg file and run from within VFP)***

Local sURLandFile, nRet

Declare DoFileDownload IN shdocvw.dll STRING lpszFile

sURLandFile = "ftp://ftp.microsoft.com/deskapps/readme.txt";

sURLandFile = HandleUnsafeChars(sURLandFile)

IF !EMPTY(sURLandFile)
    nRet=DoFileDownload(STRCONV(sURLandFile,5))
ELSE
    MESSAGEBOX("Function returned an empty length string.",16,"Something is Wrong")
ENDIF

************************
FUNCTION HandleUnsafeChars(sAddressUrl)
***Purpose: Change unsafe chars to escape sequences
************************
    #DEFINE ICU_BROWSER_MODE 33554432 && 0x2000000

    DECLARE INTEGER InternetCanonicalizeUrl IN wininet;
        STRING sURL, STRING @sBUFFER, INTEGER @nLength, INTEGER nFlags

    LOCAL sNewUrl, nResult

    nResult = 250
    sNewUrl = Replicate(Chr(0), nResult)

    IF InternetCanonicalizeUrl (sAddressUrl,@sNewUrl, @nResult, ICU_BROWSER_MODE) <> 0
        RETURN Left(sNewUrl, nResult)
    ELSE
        RETURN ""
    ENDIF
    
ENDFUNC &&HandleUnsafeChars

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