How to change class file?

There is nothing special you have to do. Just modify the classes you need and recompile the project.

Hello,

Can you please let me know the process of getting the class file using dll and changing it as my requirement.

What kind of change do you need to make?

I want to change background color of navigator, highlighting option in navigator, displaying months in navigator according to user's view. There are lot of things i want to change according to user's requirement.