Howto: Create a Custom Control in ASP.NET (C#)

Creating custom controls can save you a lot of time and effort when building an application. The built-in sever controls provided can do just about anything you need them to, but sometimes it takes a great deal of coding (hacking) to make it do exactly what you want it to do. Consider the possibility that you need a textbox control that you would like to be able to assign a readony property to it so it either renders as a regular textbox if false or plain text if true.

You may also want a textbox that will cause it's on "OnTextChanged" to bubble up in the "GridViewCommandEvent" of a Gridview control. By default the textbox does not support that.

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