classical way of program and oop program

[pragashan]

I'm new to OOP technology.

I heard about 2 tier and 3 tier architectures (layers). I read some article about that.
but from that I couldn't understand why they do like that.

ok, now let see

If I want to update my records (It has 5 fields). they create three layers for that. If they want to add one or more field(s), they need to modify all the 3 layers.

In classical way we can easily do that.

(If we consider VB and VB.Net)

but one thing I could undedrstand in OOP, function is good (I mean class)

can you suggest any article about OOP programs against classical way of programs.

one thing I know, I couldn't really understand the concept of class in OOP

OOP is a powerfull technology.


I really want to change my classical way of writing programs. that's why I ask.

can you give a good article about this, I really apreciate that.

-thanks.