MS CRM 3.0.5 SDK

A very helpful resource is the Software Developer's Kit (SDK) from MS. Here is a link to the latest version that was released on 6/26/06:

http://www.microsoft.com/downloads/details.aspx?FamilyID=9c178b68-3a06-4898-bc83-bd14b74308c5&DisplayLang=en

The SDK has samples of code for advanced functionality-all with syntax that has the blessing from Microsoft...which is always good because of the guarantee of compatability with the next version.