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How Does The Interface Between The Dynpro And The Abap/4 Modules Take Place?

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A transaction is a set of screens and ABAP/4 routines, controlled and carried out by a Dialog processor. The Dialog processor processes screen after the screen, thus triggering the proper ABAP/4 processing of each screen. For each screen, the system process the flow logic that contains the equivalent ABAP/4 processing. The controls pass from screen flow logic to ABAP/4 code and back.

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