Module pool programming

 Module pool programming

    * It is used to display custom input screens and output screens.

    *  Also called dialog programming

    * Module pool is a collection of screens, flow logic, menu bars, and abap code that you used to build application.

    * It is a special type of programming which is used to create custom sap screen.

    * T code - SE80

    ** PBO-process before output.

> triggered before mpp screen is displayed.

    ** PAI - Process after input

> process after mpp screen is displayed.

    ** POV - Process onvalue request

> triggered when user clicks on search on help or f4 button.

    ** POH - process on help request 

> triggered when user clicks on search on help or f1 button.




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