TThemedExplorerBar describes the possible themable parts of an explorer bar control.

TThemedExplorerBar = (
  tebExplorerBarDontCare,
  tebExplorerBarRoot,
  tebHeaderBackgroundNormal,
  tebHeaderBackgroundHot,
  tebHeaderBackgroundPressed,
  tebHeaderCloseNormal,
  tebHeaderCloseHot,
  tebHeaderClosePressed,
  tebHeaderPinNormal,
  tebHeaderPinHot,
  tebHeaderPinPressed,
  tebHeaderPinSelectedNormal,
  tebHeaderPinSelectedHot,
  tebHeaderPinSelectedPressed,
  tebIEBarMenuNormal,
  tebIEBarMenuHot,
  tebIEBarMenuPressed,
  tebNormalGroupBackground,
  tebNormalGroupCollapseNormal,
  tebNormalGroupCollapseHot,
  tebNormalGroupCollapsePressed,
  tebNormalGroupExpandNormal,
  tebNormalGroupExpandHot,
  tebNormalGroupExpandPressed,
  tebNormalGroupHead,
  tebSpecialGroupBackground,
  tebSpecialGroupCollapseSpecial,
  tebSpecialGroupCollapseHot,
  tebSpecialGroupCollapsePressed,
  tebSpecialGroupExpandSpecial,
  tebSpecialGroupExpandHot,
  tebSpecialGroupExpandPressed,
  tebSpecialGroupHead
);

enum TThemedExplorerBar {
  tebExplorerBarDontCare,
  tebExplorerBarRoot,
  tebHeaderBackgroundNormal,
  tebHeaderBackgroundHot,
  tebHeaderBackgroundPressed,
  tebHeaderCloseNormal,
  tebHeaderCloseHot,
  tebHeaderClosePressed,
  tebHeaderPinNormal,
  tebHeaderPinHot,
  tebHeaderPinPressed,
  tebHeaderPinSelectedNormal,
  tebHeaderPinSelectedHot,
  tebHeaderPinSelectedPressed,
  tebIEBarMenuNormal,
  tebIEBarMenuHot,
  tebIEBarMenuPressed,
  tebNormalGroupBackground,
  tebNormalGroupCollapseNormal,
  tebNormalGroupCollapseHot,
  tebNormalGroupCollapsePressed,
  tebNormalGroupExpandNormal,
  tebNormalGroupExpandHot,
  tebNormalGroupExpandPressed,
  tebNormalGroupHead,
  tebSpecialGroupBackground,
  tebSpecialGroupCollapseSpecial,
  tebSpecialGroupCollapseHot,
  tebSpecialGroupCollapsePressed,
  tebSpecialGroupExpandSpecial,
  tebSpecialGroupExpandHot,
  tebSpecialGroupExpandPressed,
  tebSpecialGroupHead
};