SAP SELECTION SCREEN CALL

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Calling Selection Screens
Selection screens can be called as follows:

by the statement SUBMIT

as a selection screen of a report transaction

as the initial screen of a dialog transaction

by the statement CALL SELECTION-SCREEN
Each call starts selection screen processing.

Called by SUBMIT
When an executable program is called using the statement SUBMIT, the standard selection screen or the selection screen specified in the statement is called between the events INITIALIZATION and START-OF-SELECTION, if it contains at least one input field or pushbutton.

Called by report transaction
When a report transaction is executed, the associated executable program is also started internally using SUBMIT and the selection screen defined for the transaction is called between the events INITIALIZATION and START-OF-SELECTION.

Called by dialog transaction
If a selection screen of the associated program is defined as the initial screen in a dialog transaction, the transaction code is used to call the selection screen when this program is executed. This screen is not handled like the first screen in a dynpro sequence however (see Selection Screen Processing).

Note
You should not use a selection screen as the initial screen of a dialog transaction, since this does not generally produce the expected program behavior.