how to choose one of compenent and control

sorry about cant type chinese,

first, the compenent and custom control what relationship is between.

Those two things have huge differents. 

the common is: 1. very strong and useful.

                       2. make the application more convinent/

                       3. basic programming in bottom level of code. high skill

                       4. oriented object programming/Architecture

the difference is: 1. the custom control is much coding thing in vb and code safe

                         2. the compenent just mix two or three more data controls

                             working together.

                         3. compenent  class() inherits

                        4. custom control  namespace implements.                     

I just want to consider which one I need to choose.

I like both of them both make the web page more professional and functional.