wxCONTROL_ISSUBMENU = wxCONTROL_SPECIAL, // only for the menu items
wxCONTROL_EXPANDED = wxCONTROL_SPECIAL, // only for the tree items
wxCONTROL_SIZEGRIP = wxCONTROL_SPECIAL, // only for the status bar panes
+ wxCONTROL_FLAT = wxCONTROL_SPECIAL, // checkboxes only: flat border
wxCONTROL_CURRENT = 0x00000010, // mouse is currently over the control
wxCONTROL_SELECTED = 0x00000020, // selected item in e.g. listbox
wxCONTROL_CHECKED = 0x00000040, // (check/radio button) is checked