Get the value in a field

Hi,
I have a variable in which some value will be there and that will change. I.e it cannot be fixed.
For Ex g_var has 20 or 30 etc.
I need to display my output starting that that value.
How do I get his. I am sure I need to use field symbols.But am very poor in using field symbols. can some one help me please.
Thanks,
Kiran

Hi Rob,
Let me explain the complete scenario..
Am using AFTER_LINE_OUTPUT & BEFORE_LINE_OUTPUT to handle my subtotals. So one of my write statements in after_line_output is the grand totals.
      WRITE: AT /    sy-vline,
                 2   text-092,
                 70  g_total_pr,
                 100 sy-vline.
System automatically puts a ULINE as per the List/line size(which will varry some times) So, if I display sy-vline at 100th place, it doesn't complete the box completely. I get extra horizontal line. So I want to capture the line size and then display the sy-vline at that place.
This is my req. Hope am clear in explaining now.
Please suggest me any clues.
Thanks,
Kiran

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