How to add select-Options screen to screen

1. Define select-Options screen and event processing in a unit
Data: number (4) Type N value '20140901 '.
Selection-screen begin of screen 1100 as subscreen.
Selection-screen begin of block block_0 with frame title text-000.
Selection-screen begin of line.
Selection-screen Comment 1 (8) Text-002.
Selection-screen position pos_low.
Parameters: p_date1 type DATs default sy-datum obligatory.
Selection-screen comment pos_high (8) Text-003.
Parameters: p_date2 type DATs default sy-datum obligatory.
Selection-screen end of line.
Select-options s_pq for zjw_bs_jg-zjgid_c no intervals.
Select-options s_psz for zjw_bs_jg-zjgid_c no intervals.
Select-options s_tjid for zjw_xq_swtj-zswtjid_c.
Parameters: p_con radiobutton group SC2.
Parameters: p_fy radiobutton group SC2 default 'x '.
Parameters: p_blank radiobutton group SC2.
Selection-screen end of block block_0.
Selection-screen end of screen 1100.
At selection-screen on value-request for s_psz-low.
Perform help_psz using 'low' 1100 '.

2. Define screen 100
Add a sub-screen on screen 100Sub_screen

3. Define screen 100 BPO
Process before output.
Module show_logonscreen. "Call the logon screen
Module grid_list_init. "screen Initialization
Module status_0100.
Call subscreen sub_screen including sy-repid number.

4. Define screen 100 Pai
Process after input.
Module exec_exit_100 at exit-command.
Module exec_before_100.
Call subscreen sub_screen.
5 module definition

Module status_0100 output.
* Set the status of each function in the toolbar Based on the operation status and set
* The functions in the current operation status that need to be blocked are put into the inner table.
Perform before_set_100status.
* Call the toolbar and disable the functions contained in the internal table.
Set PF-STATUS '200' excluding excl_func.
Set titlebar '123 '.
Endmodule. "status_0100 output
6 selection screen event

At selection-screen on value-request for s_psz-low.
Perform help_psz using 'low' 1100 '.
*&--------------------------------------------------------------------*
* & Form value_help_vkbur_low
*&--------------------------------------------------------------------*
* The brand selection box is displayed based on the internal table data.
At selection-screen on value-request for s_pq-low.
* Area
Refresh it_pq.
Clear it_pq.
Select zjgid_c zjgname_c into Table it_pq
From z1__bs_jg
Where zjglx_ I = 5.
Call function 'f4if _ int_table_value_request'
Exporting
Retfield = 'zjgid _ C'
Dynpprog = sy-repid
Dynpnr = '000000'
Dynprofield = 'P _ PQ '"screen Field
Value_org = 'S'
Tables
Value_tab = it_pq.

At selection-screen on value-request for s_drpsz-low.
Perform help_1200psz using '000000' S _ DRPSZ-LOW '.

At selection-screen on value-request for s_dcpsz-low.
Perform help_1200psz using '000000' S _ DCPSZ-LOW '.

At selection-screen.
If sy-dynnr = 1100.
If OK _code = 'cacl '.
If p_date1> p_date2.
Message e040. "message exited when the start date is greater than the end date
Exit.
Endif.
Endif.
Elseif sy-dynnr = 1200.
If OK _code = 'sear '.
If p_dates> p_datee.
Message e040. "message exited when the start date is greater than the end date
Exit.
Endif.
Endif.
Endif.

At selection-screen output.
If sy-dynnr = 1200.
Loop at screen.
Case screen-name.
When's _ DRPSZ-LOW 'or
'% _ S_drpsz _ % _ app _ %-valu_push' or
'S _ DCPSZ-LOW 'or
'% _ S_dcpsz _ % _ app _ %-valu_push' or
'P _ dates' or
'P _ datee '.
Case status_mtn.
When 'A' or 'u '.
Screen-input = '0 '.
When others.
Screen-input = '1 '.
Endcase.
Modify screen.
Endcase.
Endloop.
Endif.