title: Change value of import parameter function module abap
body: <p>I have a FM with structure in importing. When I try to change field value (<code>wa_str-data = '31129999'</code> for example), the change works, but when I get out of the FM, the field value is reset.</p>
  <p>Is it possible to change the field value of a Function Module importing parameter which is of structured type?</p>
  <p>Thanks to all.</p>