ASP : Dynamically Setting Master Page Body OnLoad Event script from a Child Page

It's not obvious to detect 'load unload' page events' when using a master page
Here is a nice way on how to do .
http://forums.asp.net/p/1310519/2584110.aspx

Building Windows Script Com Components

Sometimes it's more easy to use 'com' components than using 'asp'
http://www.4guysfromrolla.com/webtech/050400-1.shtml

Creating Custom ASP.NET AJAX Client Controls

Nice article
http://en.csharp-online.net/Creating_Custom_ASP.NET_AJAX_Client_Controls

ASP.NET: Create AJAX Server Controls using the ScriptControl base class

Finding working samples is not so simple.
I got one :-)
http://pietschsoft.com/post/2008/05/ASPNET_Create_AJAX_Server_Controls_using_the_ScriptControl_base_class.aspx

Ajax Control : Error Type not Found

This is a typical error when creating a control.

Here is an elegant solution

http://www.nablasoft.com/alkampfer/index.php/2008/05/06/aspnet-ajax-type-is-not-defined-or-sys-is-not-defined/