 levels of the application. If not provided, Type
defaults to ExtensionType.Core.</p>

<p>The <b>IAddin</b> interface, which must be implemented by each Addin,
is defined as follows:</p>

<pre class="prettyprint">
	public interface IAddin
	{
		bool Install( IExtensionHost host );
	}
</pre>

<p> The <b>Install</b> method is called by each host for which the addin has
specified an ExtensionType. The addin should check that the necessary extension
points are available and install itself, returning true for suc