Answer / bharath

1.If you want to get a popup in normal report program, call
function module POPUP_TO_CONFIRM.
2.If you want to get a popup in ALV program, then call
function 'REUSE_ALV_POPUP_TO_SELECT'.

Answer / subodh s. gholkar

If you want to display alv in POP UP window then use
parameters I_SCREEN_START_COLUMN , I_SCREEN_START_LINE ,
I_SCREEN_END_COLUMN , I_SCREEN_END_LINE .

eg :-

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
I_CALLBACK_PROGRAM = V_REPID
IS_LAYOUT = WA_LAYOUT
IT_FIELDCAT = T_FCAT
* IT_EVENTS = T_EVENT
I_SCREEN_START_COLUMN = 10
I_SCREEN_START_LINE = 2
I_SCREEN_END_COLUMN = 100
I_SCREEN_END_LINE = 20
TABLES
T_OUTTAB = ITAB
EXCEPTIONS
PROGRAM_ERROR = 1
OTHERS = 2. .
IF SY-SUBRC <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.

Answer / kaushik

use :1. call screen if u have any screen program by CALL
screen 100 starting at 25 25.
2. use any popup related FM.

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