How to set skin to null for button?

How to set skin to n开发者_Go百科ull for button?

button = new Button();
button.useHandCursor=true;
button.buttonMode =true;

i want to set button.skin = null

Thanks

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Flex 3 or Flex 4?

• Flex 4 version

  button.setStyle("skinClass", null)

• Flex 3 version

  button.setStyle("upSkin", null) button.setStyle("downSkin", null) button.setStyle("overSkin", null) button.setStyle("disabledSkin", null)