Haven't posted in a while so I thought I would share some web app plugins I have created over the last year. First up is google recaptcha.
https://1drv.ms/u/s!AtZywc3WXTCusEWFFe7BNIht4aXy

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You will need a site key and secret which you can get at https://www.google.com/recaptcha
Copy the pkg file to your AppSrc directory, the js file to your AppHtml directory and paste the following into your Index.html file under Dataflex custom control comment:
HTML Code:
<script src="https://www.google.com/recaptcha/api.js"></script>
<script type="text/javascript" src="Recaptcha.js"></script>
Example Usage:
Code:
Use cRecaptcha.pkg

Object oRecaptcha is a cRecaptcha
    Set psSiteKey to "Your_Site_Key"

    Procedure OnResponse String sResponse
        Forward Send OnResponse sResponse
        WebSet pbEnabled of oWebButton to (VerifyResponse(Self, sResponse, "Your_Secret"))
    End_Procedure
End_Object