Dear Naveen,
I m writing the syntax of report.
PAI of screen 103
perform get_prg.
form get_prg .
Submit Prg_name and return via selection screen .
endform.
Pass input from PAI of 103 which is required for alv report using export statement / Set parameter.
Write a prg which should satisfy the output required in alv format.
inside the program u use import statement / Get parameter to get input from the sub screen.