The header of a program in app's

[Marcel]

Hi
If I save a app's in a with a new name, in the program catalog I will see a program with this name.
Exemple
app'name save: A new name

in program catalog: A new name (App)

If I EDIT, I see

EXPORT A_new_name()
BEGIN
END;

My question

My program have many functions so If I delete these lines of code, the program continue to work fine. These lines of code are there essentiel?

Marcel