In table cntrls fct type e refers to

Question

in table controls if  provide fct type as e ,what is the functionality of e ?

Answer 1

Function type 'E' is for Exit command.
DEMO_DYNPRO_AT_EXIT_COMMAND.
... AT EXIT-COMMAND
Effect
Addition AT EXIT-COMMAND at the event PAI causes module mod to be called exactly if:
The function used to trigger event PAI has function type "E"
Into the input field of the standard toolbar, the user entered a character string starting with "E" and confirmed it using ENTER.
The dialog module is called before the automatic input checks defined in the system or in the ABAP Dictionary and independent of its position in the event block. The only screen field transported to the ABAP program is the OK field. If the function that triggered the PAI event does not fulfill any of the above prerequisites, the MODULE statement is not executed.
If several MODULE statements have the AT EXIT COMMAND addition, only the first one is executed. If no MODULE statement has the addition AT EXIT COMMAND, a normal PAI processing is executed: The predefined input checks are executed and then the PAI event block is processed sequentially. Provided the screen processing is not terminated in the dialog module mod, after the return from the dialog module, the complete PAI processing is executed. You must not use the addition AT EXIT COMMAND in connection with the statement FIELD.
Note
The function type of a function is determined in the Screen Painter or Menu Painter. Usually those functions of the user interface are defined with function type "E" that are assigned to the icons Back, Exit and Cancel in the standard toolbar of the GUI status. Therefore, the called dialog module should terminate the screen processing and allow security checks, if required.
Regards
Vijay