Using Custom SPFieldMultiColumn Class 2

After that Using Custom SPFieldMultiColumn Class 1 including steps to follow

In this scenario, I'll make a Class Library and to save a phone number like this ##) ####-#### and to show as well in New/Edit Mode.

1. [Field Class]


2. [Field Control Class]
- Member Variables and Value Property


- Create Child Controls

- [in CreateChildControl] Make a table and put controls into it


3. [Field Definition]

4. Test (Create a new column, a new item and see an item)