Adding simple text field to page/table

On MSDN there's a How to on adding a field to a table:
http://msdn.microsoft.com/en-us/library/dd338967(v=nav.70).aspx

To add a field to a table
On the Tools menu, choose Object Designer.
Object Designer opens.
Choose Table and then choose New.
Table Designer opens.
In the first empty row, enter a Field Name and a Field No. Enter a Data type and appropriate Length. Description is optional.

nav13 wrote:

Thanks!

What about adding it to the page then?

Thanks,
NAV13

Almost the same, but click Page in Object Designer. Choose the page you want. Add Field with menu or take a look at the other lines and copy that.

nav13 wrote:

I should also document the code correct?

It depends on the situation. When you're making this for one customer, documenting in the documentation trigger what you have done can be helpfull for other developers.
When you develop for an add-on, you don't want to mention every difference between standard NAV and the add-on in the documentation trigger.

What's the situation in which you are developing?