Access Controls from another class in (WFA) C#

Question

Hey guys,I'm really happy to registered in this forum :) the best forum for c#

 

these days I'm trying to learn and practice OOP in c# , today i want to solve a question...

 

i have this Form1

Then i made a class in a folder called Services i want to code Calculate Button in that class with a void method

and then call that method in click event for that Calculate button ...

how can i access controls ( labels , buttons , textboxes, ...) in that class called Calculate Tax ?

please tell me the thing related to oop for c# 

 

thanks !