ASP.net bind expression
<p>I am looking into some code in a open source ASP.net web app - NopCommerce.
There is a binding expression in the tag that I never seen before.
Can someone tell me what it is?
How does this loginbutton get fired with out the "onclick" attribute?
Where can I find the source code class in the Solution?</p>

<p>Thanks</p>

<pre><code>&lt;asp:Button ID="LoginButton" runat="server" CommandName="Login" Text="&lt;% $NopResources:Login.LoginButton %&gt;
</code></pre>
