Customising components

Hey i am new at roku development. I need help in developing sliding control in a small part of screen.Please check selected part of below image.I was thinking of using sliding panel if someone have a better idea or any example ?
https://drive.google.com/open?id=0B-JfO … V80ckpEeEE

You could use onKeyEvent to change the label:

function onKeyEvent(key as String, press as Boolean) as Boolean
  handled = false  
  if press then
    if (key = "right") then
    ' here goes your code 
        handled = true
    else if (key = "left") then
    ' here goes your code 
        handled = true
    end if
  end if
  return handled
end function