I am looking for a solution to integrate a WPF desktop application with reCaptcha! Does anyone know a solution?
I am working on a registration module in my application and need a good and clear handling.
Thanks!
See https://developers.google.com/recaptcha/docs/display and https://developers.google.com/recaptcha/docs/verify .
You can request http://www.google.com/recaptcha/api/challenge?k=your_public_key and analyze the ChallengeValue. You can use this value to obtain a recaptcha image using http://www.google.com/recaptcha/api/image?c=challenge_value . Afaik URL Images can be displayed directly in WPF.
Allows the user to enter a TextBox control (or similar).
To verify, use this input and make a request http://www.google.com/recaptcha/api/verify (see the documentation above).
Have you tried this - http://code.google.com/apis/recaptcha/docs/aspnet.html . He says that it works in any .Net language, including C #. There is also this page , although she is 2 years old.