New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Keyboard Support

Get Audio Code

AccessKey with value A is applied to RadCaptcha.

Press Alt + AccessKey in IE / Chrome, Alt + Shift + AccessKey in FireFox, Shift + Esc + AccessKey in Opera, or use Tab to move to and focus the control.

Press Enter to fire the RadCaptcha validation and submit the page.

Note: By default tab-access is disabled in Safari. To enable it, check "Preferences > Advanced > Press tab to highlight each item on the page".

  • DefaultCS.aspx
  • DefaultCS.aspx.cs
<%@ Page Language="c#" AutoEventWireup="true" Inherits="Telerik.Web.Examples.Captcha.Accessibility.DefaultCS"CodeFile="DefaultCS.aspx.cs"  %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<!DOCTYPE html>
<html xmlns=''>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadFormDecorator RenderMode="Lightweight" ID="RadFormDecorator1" runat="server" DecorationZoneID="zoneToDecorate"
        DecoratedControls="All" />
    <div class="demo-containers">
        <div class="demo-container" id="zoneToDecorate">
            <telerik:RadCaptcha Skin="Office2007" AccessKey="A" ID="RadCaptcha1" runat="server"
                ErrorMessage="You have entered an invalid code" ValidationGroup="SubmitGroup"
                ForeColor="Red" CaptchaImage-EnableCaptchaAudio="true">
            <asp:Button ID="Button1" runat="server" Text="Button" ValidationGroup="SubmitGroup">

Support & Learning Resources

Find Assistance