>How can I program in a form to have a method to disable a option in the menu?
>
>For example, I wouldn't want the users to create new when I am in a edit mode. Hence I would like to disable the "New" option under the "File" in the menu.
>
>How can I refer to the particular option?

in the menu designer (or programmatically) you can have:

skip for wExist("SomeFormName")

for any menu item.