SAP DETERMINE_SCREEN_NUMBER Function Module for Determine actual screen number

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DETERMINE_SCREEN_NUMBER is a standard determine screen number SAP function module available within SAP R/3 or S/4 Hana systems, depending on your version and release level. It is used for Determine actual screen number processing and below is the pattern details for this FM, showing its interface including any import and export parameters, exceptions etc. there is also a full "cut and paste" ABAP pattern code example, along with implementation ABAP coding, documentation and contribution comments specific to this or related objects.

See here to view full function module documentation and code listing for determine screen number FM, simply by entering the name DETERMINE_SCREEN_NUMBER into the relevant SAP transaction such as SE37 or SE38.

Function Group: LMGT
Program Name: SAPLLMGT
Main Program: SAPLLMGT
Appliation area: L
Release date: N/A
Mode(Normal, Remote etc): Normal Function Module
Update:

Function DETERMINE_SCREEN_NUMBER pattern details

In-order to call this FM within your sap programs, simply using the below ABAP pattern details to trigger the function call...or see the full ABAP code listing at the end of this article. You can simply cut and paste this code into your ABAP progrom as it is, including variable declarations.

CALL FUNCTION 'DETERMINE_SCREEN_NUMBER'"Determine actual screen number
  EXPORTING
   LSCRN =  "Logical screen number

 IMPORTING
   PSCRN =  "Actual screen number

EXCEPTIONS
   SCREEN_NOT_FOUND = 1 

.

Customer Function user exits

Below is a list of CUSTOMER FUNCTION exit user exits that are available within this program and maybe relevant for this FM.
EXIT_SAPLLMGT_001 Extension for barcode translation
EXIT_SAPLLMGT_083 User exit for print

IMPORTING Parameters details for DETERMINE_SCREEN_NUMBER

LSCRN - Logical screen number

Data type: SY-DYNNR
Optional: No
Call by Reference: No ( called with pass by value option)

EXPORTING Parameters details for DETERMINE_SCREEN_NUMBER

PSCRN - Actual screen number

Data type: SY-DYNNR
Optional: No
Call by Reference: No ( called with pass by value option)

EXCEPTIONS details

SCREEN_NOT_FOUND -

Data type:
Optional: No
Call by Reference: No ( called with pass by value option)

Copy and paste ABAP code example for DETERMINE_SCREEN_NUMBER Function Module

The ABAP code below is a full code listing to execute function module POPUP_TO_CONFIRM including all data declarations. The code uses the original data declarations rather than the latest in-line data DECLARATION SYNTAX but I have included an ABAP code snippet at the end to show how declarations would look using the newer method of declaring data variables on the fly. This will allow you to compare and fully understand the new inline method. Please note some of the newer syntax such as the @DATA is not available until a later 4.70 service pack (SP8), which i why i have stuck to the origianl for this example.

ABAP code using 7.40 inline data declarations to call FM DETERMINE_SCREEN_NUMBER

The below ABAP code uses the newer in-line data declarations. This allows you to see the coding differences/benefits of the later inline syntax. Please note some of the newer syntax below, such as the @DATA is not available until 4.70 EHP 8.

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