blackberry - Color a certain portion of horizontal manager -

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i have horizontal manager having 3 label fields shown has "1:00 event1" in screen ,i want set background color hfm covering 1:00 ,how can ?

horizontalfieldmanager horizontalfieldmanager_left15 = new horizontalfieldmanager(                 manager.horizontal_scroll);          horizontalfieldmanager_left15.add(time15label);         horizontalfieldmanager_left15.add(min15label);           horizontalfieldmanager_left15.add(evetnlabel);

thanks

refer - 

horizontalfieldmanager horizontalfieldmanager_left15 = new horizontalfieldmanager(             manager.horizontal_scroll);  labelfield lb = new labelfield(time15label)  {

//setting backgroundcolor of text

protected void paint(graphics graphics) {          graphics.setcolor(color.lavendar);             super.paint(graphics);         }     };

//setting backgroundcolor of textarea

 protected void paintbackground(graphics graphics) {          graphics.setbackgroundcolor(color.goldenrod);          graphics.clear();         }     };       horizontalfieldmanager_left15.add(time15label);

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