1. The easiest way to do this is by using a custom TextBox to validate the user input, and using a Label to display the ErrorMessage when validation fails. Follow this demo to validate a custom TextBox: http://demos.telerik.com/aspnet-ajax/captcha/examples/refreshimage/defaultcs.aspx
Set the Display
property to None
and the ErrorMessage will not be shown above the CaptchaImage.
2. RadCaptcha itself is an ASP.NET validator. Please provide more information about your scenario, so we can provide an adequate solution.
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