ABAP SELECTION-SCREEN STANDARD Statement syntax, information and example SAP source code

SELECTION-SCREEN - Standard Selection Screens

Each executable program contains a standard selection screen with the screen number 1000. The screen elements on the standard selection screen are defined by all PARAMETERS , SELECT-OPTIONS , and SELECTION-SCREEN statements that are not within the definition of a stand-alone selection screen, in other words, that are not defined between the following statements:

SELECTION-SCREEN BEGIN OF SCREEN ...
...
SELECTION-SCREEN END OF SCREEN ...

If a standard selection screen comprises the screen for the executable program and the screen for a logical database , the screen elements for the executable program are listed below those for the logical database.
Function groups and module pools do not have a standard selection screen. Here, you must place the three statements PARAMETERS , SELECT-OPTIONS , and SELECTION-SCREEN
within the definition of the stand-alone selection screen.

Latest notes: It is advisable to group all the statements that define the standard selection screen and list them in the global declaration section together with the definitions of stand-alone selection screens.