Passing Value from a Driver Program

Hi,
How can i send a specific field's value alone to the form from driver program ?
we normally use write_form in Loop & end loop.
if i wanna send a value from one flied alone wat shud i do??
Pls help me...
Thank You.

Hi
See the sample code for Subroutines and do accordingly
How to call a subroutine form SAPscripts
The Form :
/:PERFORM CDE_CENT IN PROGRAM ZKRPMM_PERFORM_Z1MEDRUCK
/:USING &EKKO-EBELN&
/:CHANGING &CDECENT&
/:ENDPERFORM
The report :
REPORT zkrpmm_perform_z1medruck .
DATA : BEGIN OF it_input_table OCCURS 10.
INCLUDE STRUCTURE itcsy.
DATA : END OF it_input_table.
déclaration de la table output_table contenant les
variables exportées
DATA : BEGIN OF it_output_table OCCURS 0.
INCLUDE STRUCTURE itcsy.
DATA : END OF it_output_table.
DATA : w_ebeln LIKE ekko-ebeln,
w_vbeln LIKE vbak-vbeln,
w_zcdffa LIKE vbak-zcdffa.
FORM CDE_CENT
FORM cde_cent TABLES input output.
it_input_table[] = input[].
it_output_table[] = output[].
READ TABLE it_input_table INDEX 1.
MOVE it_input_table-value TO w_ebeln.
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'
EXPORTING
input = w_ebeln
IMPORTING
output = w_ebeln.
SELECT SINGLE zcdffa FROM ekko
INTO w_zcdffa
WHERE ebeln = w_ebeln.
it_output_table-name = 'CDECENT'.
MOVE w_zcdffa TO it_output_table-value.
MODIFY it_output_table INDEX 1.
output[] = it_output_table[].
ENDFORM.
REPORT ZMPO1 .
form get_freight tables in_par structure itcsy out_par structure itcsy.
tables: ekko,konv,t685t.
data: begin of itab occurs 0,
         ebeln like ekko-ebeln,
         knumv like ekko-knumv,
       end of itab.
data: begin of itab1 occurs 0,
         knumv like konv-knumv,
         kposn like konv-kposn,
         kschl like konv-kschl,
         kbetr like konv-kbetr,
         waers like konv-waers,
         kwert like konv-kwert,
       end of itab1.
data: begin of iout occurs 0,
         kschl like konv-kschl,
         vtext like t685t-vtext,
         kbetr like konv-kbetr,
         kwert like konv-kwert,
       end of iout.
data v_po like ekko-ebeln.
read table in_par with key 'EKKO-EBELN'.
if sy-subrc = 0.
   v_po = in_par-value.
   select
     ebeln
     knumv
from ekko
into table itab
where ebeln = v_po.
if sy-subrc = 0.
    loop at itab.
      select
        knumv
        kposn
        kschl
        kbetr
        waers
        kwert
      into table itab1
      from konv
      where knumv = itab-knumv and
            kappl = 'M'.
    endloop.
    loop at itab1.
      if itab1-kposn <> 0.
        select single * from t685t
                          where kschl = itab1-kschl
                            and kappl = 'M'
                            and spras = 'EN'.
        iout-vtext = t685t-vtext.
        iout-kschl = itab1-kschl.
        iout-kbetr = itab1-kbetr.
        iout-kwert = itab1-kwert.
        append iout.
        clear iout.
      endif.
    endloop.
    sort itab1 by kposn.
    loop at iout.
      sort iout by kschl.
      if ( iout-kschl eq 'GSDC' OR
           iout-kschl eq 'GSFR' OR
           iout-kschl eq 'GSIR' ).
        at end of kschl.
          read table iout index sy-tabix.
          sum.
         write:/ iout-kschl,iout-vtext,iout-kwert.
      out_par-name = 'A1'.
      out_par-value = iout-vtext.
      append out_par.
      out_par-name = 'A2'.
      out_par-value = iout-kwert.
      append out_par.
          endat.
        endif.
      endloop.
    endif.
endif.
endform.
IN THE FORM I AM WRITING THIS CODE.
/:DEFINE &A1& = ' '
/:DEFINE &A2& = ' '
/:PERFORM GET_FREIGHT IN PROGRAM ZMFORM_PO1
/:USING &EKKO-EBELN&
/:CHANGING &A1&
/:CHANGING &A2&
/:ENDPERFORM
&A1&
&A2&
This Code is to be written in the PO form under ADDRESS window.
/:DEFINE &A1& = ' '
/:DEFINE &A2& = ' '
/:DEFINE &A3& = ' '
/:DEFINE &A4& = ' '
/:DEFINE &A5& = ' '
/:DEFINE &A6& = ' '
/:PERFORM GET_VENDOR IN PROGRAM ZMFORM_PO
/:USING &EKKO-EBELN&
/:CHANGING &A1&
/:CHANGING &A2&
/:CHANGING &A3&
/:CHANGING &A4&
/:CHANGING &A5&
/:CHANGING &A6&
/:ENDPERFORM
&A1&
&A2&
&A3&
&A4&
&A5&
&A6&
Reward points for useful Answers
Regards
Anji

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import javax.swing.JButton;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.sql.*;
<applet code = "DocApplet" width = 500 height =5000>
</applet>
public class DocApplet extends JApplet
     private JPanel jp;
     private Container cp;
     private JTextArea jt;
     private JToolBar tb;
     private JScrollPane sp;
     private String annotation;
     private String url;
     private Connection con;
     private Statement stmt;
     public void init()
          jp = new JPanel();
          cp = getContentPane();
          jt = new JTextArea();
          tb = new JToolBar();
          sp = new JScrollPane(jt);
          repaint();
     public void start()
          jp.setLayout(new BorderLayout());
          jp.add(tb, BorderLayout.NORTH);
          jp.add(sp, BorderLayout.CENTER);
          jt.setBackground(Color.BLACK);
          jt.setForeground(Color.WHITE);
          setContentPane(jp);
          addButtons(tb);
          repaint();
     public void run()
          repaint();
     public void paint()
     private void addButtons(JToolBar tb)
          JButton button = null;
          button = new JButton("Save");
          button.addActionListener(new ActionListener()
               public void actionPerformed(ActionEvent e)
          tb.add(button);
}

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