How to make my own component library?

Question

12/03/2005 Hariom (a word to wish) All, I wish to create my own components and their own properties and events. Say a text box containing a property named "type" must contain two options 1) IsNumeric 2) AlphaNumeric. If I select "IsNumeric", it should not allow other than digits only. If anybody could help me the coding part, please do. Thanx in advance. Abhishek Maitrey