Attributes for LISTVIEWs
  ===================================================================

  LVSTYLE     StyleMask

     Will set the style for the whole listview. The StyleMask is
     defined as a 3 or 4 digit number, each digit meaning :
        1st digit  - ForeGround color (the pen number)
        2nd digit  - Background color (normal lines)
        3rd digit  - Selected Background color (selected lines)
        4th digit  - (optional) Color of "shadow" which will be
                     used to give the text a 3D effect.
     ex : ATTR LVStyle 2031  ; set white on black 3D text

  DIRSTYLE    StyleMask

     Will set the style for DIRs, VOL, ASN etc in Dir LVs

  FIELDSTYLE  %FieldName/StyleMask

     Sets the style for each field.
     ex: SETATTR MyGui.gc 1 FieldStyle %field/2031

  LVLINEDIST  Pixels

     Will set the distance between lines in a listview.
     By default this distance is 0.

  LVFILTER    Pattern

     Will filter the files in a dir listview according to the 
     pattern you give - examp - make a LV hide all the icons:
     > SetAttr MyGui.gc/1 LVFILTER "~(#?.info)"
     Must <LVDir refresh> for the change to actually take place.

     Example :  Run Gui   Source