Hi. everyone.
I'd like to register an event handler declaretively by content type.
According to a paragraph of this article, it seems to be possible, but i don't know how to do this.
Declaratively by content type, for example, to register an event handler for all documents of a specific type. Within the XML for a content type definition, you can register event receivers.
I created two content type named ct_a, ct_b, and I derived them from document content type.
ct_a and ct_b had a event handler respectively and were associated with a list named list_a.
What i want to know are how to associate a event hander with a content type
and how to activate them.
Thanks for in advance.

How to register an event handler declaratively by content type?
TechNoFear
Jeon,
This was very helpful, specially since we are provisioning our site using ONET.XML and it's the only way to bind the handlers.
Thanks.
Mirricle
This is the answer.
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
<ContentType ID="0x0100c07095261b4f48408d60ad8654b69d68" Name="DevelopingCT" Group="Development" Description="Developing Content Type" Version="0">
<FieldRefs>
<FieldRef ID="{0c177b88-bf35-4692-8456-cc14aaabecc0}" Name="DevelopingCTField" />
</FieldRefs>
<XmlDocuments>
<XmlDocument NamespaceURI="http://schemas.microsoft.com/sharepoint/events">
<spe:Receivers xmlns:spe="http://schemas.microsoft.com/sharepoint/events">
<Receiver>
<Name>ItemAdded</Name>
<Type>ItemAdded</Type>
<SequenceNumber>1</SequenceNumber>
<Assembly>AssemblyName, Version=1.0.0.0, Culture=neutral, PublicKeyToken=TokenNumber</Assembly>
<Class>Namespace.ClassName</Class>
<Data>
</Data>
<Filter>
</Filter>
</Receiver>
<Receiver>
<Name>ItemAdding</Name>
<Type>ItemAdding</Type>
<SequenceNumber>2</SequenceNumber>
<Assembly>AssemblyName, Version=1.0.0.0, Culture=neutral, PublicKeyToken=TokenNumber</Assembly>
<Class>Namespace.ClassName</Class>
<Data>
</Data>
<Filter>
</Filter>
</Receiver>
</spe:Receivers>
</XmlDocument>
</XmlDocuments>
</ContentType>
</Elements>