Screens and Userexits
I am having a standard transaction with a header details and Item details screen. Now I want to add some fields to the header and item details screens.
How to figure out which screen and userexit to use for this purpose. Is there any standard way of figuring them out.
Please suggest and let me know if anyone needs more info.
Ferry Lianto replied
Here are some information regarding screen exits, menu exits, user exits and field exits.
Screen exits are exits that allow you to use a reserved part of the screen (A subscreen) to display or input data.
It is determined be SAP where the sub screen will be displayed.
The syntax is: CALL CUSTOMER-SUBSCREEN
The screen exit is not processed untill the corresponding subscreen has been created in an enhancement project, and the project has been activated.
Function codes are only processed in the main screens flow logic
You are not allowed to enter a name for the subscreens command field
You are not allowed to define GUI stauses
You are not allowed to enter a value for Next screen
The global data of the program is not available for the subscreen. Data for the subscreen is provided by function modules. These function modules belongs to the same function group as the subscreen
Subscreens are edited with transaction CMOD. When you activate a project containg subscreens, the calling screen is regenerated and the subscreen is displayed next time you display the calling screen
The developer must create the subscreen and the corresponding PBO and PAI modules
How to identify screen exits
Look after CALL CUSTOMER-SUBSCREEN in the screenprogram of the screen you want to modify.
Use transaction CMOD menu Utillities -> SAP enhancements to search for screen exits
Menu exits allow you to add your own functionallity to menus. Menu exits are implemented by SAP, and are reserved menu entries in the GUI interface. The developer can add his/her own text and logic for the menu.
Function codes for menu exits all start with "+"
We want to create a new menu item in the Office menu. The text for the menu should be "Run ZTEST", and the menu will
run report ZTEST.
Goto transaction SE43 Area Menu Maintenance
In Area Menu Paramenter type 'S000' (S triple Zero)
Select Change and ignore all the warning screens
Expand the office menu. In the buttom of the office tree you will find a menu named "Customer function"
Double click on the text. In the pop-up screen change the text to "Run ZTEST". Note that the trsnaction code is +C01
Goto transaction SE93 and create transaction +C01 that calls report ZTEST.
Now you will se the menu displayed in the office tree. If you delete transaction +C01 again, the new menu will dissapear.
User exits (Function module exits) are exits developed by SAP. The exit is implementerd as a call to a functionmodule. The code for the function module is writeen by the developer. You are not writing the code directly in the function module, but in the include that is implemented in the function module.
The naming standard of function modules for functionmodule exits is: EXIT_<program name><3 digit suffix>
The call to a functionmodule exit is implemented as: CALL CUSTOMER.-FUNCTION <3 digit suffix>
The program for transaction VA01 Create salesorder is SAPMV45A
If you search for CALL CUSTOMER-FUNCTION i program SAPMV45A you will find ( Among other user exits):
CALL CUSTOMER-FUNCTION '003'
xvbak = vbak
xvbuk = vbuk
xkomk = tkomk
lvf_subrc = lvf_subrc
xvbfa = xvbfa
xvbap = xvbap
xvbup = xvbup.
The exit calls function module EXIT_SAPMV45A_003
Field exits allow you to create your own programming logic for any data element in the Dictionary. You can use this logic to carry out checks, conversions, or business-related processing for any screen field. Example: The data element BBBNR identifies a companys international location number. You might want to set up your R/3 System so that all international location numbers are larger than 100.
The field exit concept lets you create a special function module that contains this logic.
You assign the special function module to the data element BBBNR. You then assign the module to any programs and screens in which users can add new international location numbers. When you activate your field exit, the system automatically triggers your special routine whenever a user enters a company location number.
2. How to find user exits
Display the program where you are searching for and exit and search for CALL CUSTOMER-EXIT
If you know the Exit name, go to transaction CMOD. Choose menu Utillities->SAP Enhancements. Enter the exit name and press enter.
You will now come to a screen that shows the function module exits for the exit.
3. Using Project management of SAP Enhancements
We want to create a project to enahance trasnaction VA01
Go to transaction CMOD
Create a project called ZVA01
Choose the Enhancement assign radio button and press the Change button
In the first column enter V45A0002 Predefine sold-to party in sales document . Note that an enhancement can only be used i 1 project. If the enhancement is allready in use, and error message will be displayed
Press Components. You can now see that enhancement uses user exit EXIT_SAPMV45A_002. Double click on the exit.
Now the function module is displayed. Double click on include ZXVVAU04 in the function module
Insert the following code into the include: E_KUNNR = '2155'.
Activate the include program. Go back to CMOD and activate the project.
Goto transaction VA01 and craete a salesorder. Note that Sold-to-party now automatically is "2155"
Also check this links for more information.
Hope this will help.