title: hide "groups" based on formulae In Crystalreports ..?/
body: <p>am doing a report for showing catogory-sub-category wise sales report.</p>
  
  <p>i made to group headers with category and sub-category</p>
  
  <p>What i want to do is.. Hide subcategory(Group-Header) --> if user didn't specify or select any subcategory.</p>
  
  <p>..?? </p>