Something

        part 
          {
             name: "echoes.dragable.vbar";
             type: IMAGE;
             clip_to: "vbar";
             dragable 
               {
                  x: 0 0 0;
                  y: 1 1 0;
                  confine: "vrunner";
               }
             description 
               {
                  state: "default" 0.0;
                  min: 16 16;
                  rel1 
                    {
                       relative: 0.5 0.5;
                       to: "vrunner";
                    }
                  rel2 
                    {
                       relative: 0.5 0.5;
                       offset: 0 0;
                       to: "vrunner";
                    }
                  image 
                    {
                       normal: "sb_bar_v.png";
                       border: 5 5 5 5;
                    }
               }
             description 
               {
                  state: "clicked" 0.0;
                  inherit: "default" 0.0;
                  image.normal: "sb_bar_v_focus_down.png";
               }
          }