Answer / vijay babu

adding new menu into the menu item with out changing r/3
standards is known as menu exit.
adding sub=screen area into the screen with out changing
r/3 standards is known as screen exit.

Answer / sudhakar1207

IN two ways We can Enhance the SAP standard objects without
changing them.
1) Customer Exits ( Using Procedural Approach)
2) Business Add-Ins(Using Object Oriented Approach)(From
4.6C Onwards)

Customer Exits are further classified into
1) Menu Exits: Used to add the Menu Options to Standard
objects as per the customer requirement.
2) Screen Exits: Used to add Customer Fields to the standard
Objects.
3) Function Exits: Used to add Customer functionality to
standard Object.
4) Field Exits: Used to add Conversion routines as per the
customer requirement. that is both Internal to External and
Vice Verse.

Answer / harpal

As above stated is right.
In field exit we can add some user condition on based of
particular screen fields.
Every field-exit is unique for each screen.

User-Exit : these are based on Form methods.

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