In this article we will examine the need, types and the architecture of custom controls. First of al, you must be aware of your requirement whether or not it really requires a custom control irrespective of the fact you will be able to develop it or not. It might be that the case that can be best handled with user controls. To analyze the need of a custom control you must know what it lacks, if there is some similar control already in the standards controls toolkit. Sometimes you may decide to go for an entirely new control if none of the controls have any functionality that you could inherit. The need of custom controls can be better understood if we learn a little about their types.