Updating from a field symbol

Hi all

I have a requirement where i have to update my select-option(internal table) from a field symbol. The field symbol is populated with diffrent values each time the perform is called. Now i need to put the value of the field symbol firstly into select-option-low and the second time into select-option-high.

<i>for ex s_range (my select option)

<fs_fld> (the field symbol)</i>

<b>

form f_conversion_exit using p_tabname

p_fname

p_convexit

changing p_value.

field-symbols: <fs_fld> type any table.

assign component p_field of structure <dyn_wa> to <fs_fld>.

call function p_convexit

exporting

input = p_value

importing

output = <fs_fld>.</b>

The values passed into this perform are s_range-low and s_range-high.

How do i pass the value of <fs_fld> into correct field i.e s_range-low and s_range-high of the s_range table????

Kindly Help.

Regards,

Ravish Garg