title: Programmatic Skinning of Flex PopUpButton
body: <p>I am trying to programmatically skin a PopUpButton control in Flex Builder, but having no luck. As far as I know this requires writing a custom skin class or creating a modified version the control class itself (since the control is MX and not Spark). Again, just to clarify, I want to programmatically modify the appearance not simply set styling properties or display an image. I've been able to do this programmatically with other MX controls (e.g. tabs in a tab navigator), but not with the PopUpButton.</p>
  
  <p>I think part of the problem may be that the control is actually composed of two separate buttons, so you cannot draw just one rectangular area over the whole control. Does anyone know how to approach this? </p>
  
  <p>Thanks for the help!</p>