<p>I am using the ASP.Net plugin and control provided by <a href="http://recaptcha.net" rel="noreferrer">reCAPTCHA</a>. I can successfully get the control to work if the submit button on the web form is not in a validationgroup. There is no validationgroup attribute for the reCAPTCHA control. </p>

<p>Has anybody had any success with this or any solutions to get the reCAPTCHA control to work when there is a validationgroup on the web form?</p>

The reCAPTCHA ASP.NET plug-in is written to be backward-compatible with ASP.NET 1.1, which means the
```
ValidationGroup
```
concept (which is new in ASP.NET 2.0) is not supported. But the plug-in comes with
downloadable source code
, so you can modify it yourself to support
```
ValidationGroup
```
.
In ASP.NET 2.0,
validators should inherit from
```
BaseValidator
```
and implement
```
IValidator
```
, which means you should change the RecaptchaControl type to inherit from
```
BaseValidator
```
instead of
```
WebControl
```
. You will then have to modify the code a bit to implement all methods and properties defined in
```
BaseValidator
```
. Then you can use this new control on your page instead, which now supports
```
ValidationGroup
```
.