<%@ Register Assembly="Obout.Ajax.UI" Namespace="Obout.Ajax.UI.HTMLEditor" TagPrefix="obout" %>
<%@ Register Assembly="Obout.Ajax.UI" Namespace="Obout.Ajax.UI.SpellChecker" TagPrefix="obout" %>

<obout:PopupHolder runat="server" id="popupHolder" DefaultAddPolicy="Demand" />
<asp:TextBox runat="server" Rows="10" Columns="60" Text="qqq aaa text mmm" TextMode="MultiLine"
    id="textbox" spellcheck="false" /> <br />
<asp:Button runat="server" Text="Spell Checker" OnClientClick="return false;" ID="button" />
<obout:SpellCheckExtender runat="server" ID="spelcheck" PopupHolderID="popupHolder"
    PopupButtonID="button" TargetControlIDs="textbox" LeftMarker="[[" RightMarker="]]" />