Gadget, 318 - see Also BOOPSI and GadTools
  actions with SGH_KEY, 161
  ActivateGadget(), 150, 166, 321
  activating a string gadget, 150
  Activation flags, 123-124, 126, 131, 136-137, 154
  active gadget, 323
  AddGadget(), 166
  AddGList(), 122, 129, 166
  adding a gadget, 121
  adjusting borders, 126
  alternate border, 118, 127, 128
  alternate image, 118, 127, 128
  and requester, 204
  Auto-Knob for proportional gadgets, 143
  BeginRefresh(), 128
  BeginUpdate(), 128
  boolean gadgets, 129
  boolinfo flags, 139
  border gadgets, 126
  Border Structure, 128
  box gadget highlighting, 127, 128
  button gadget, 118
  Caveats
    do not share knob imagery, 143
    do not use image lists for knobs, 143
    GimmeZeroZero window border, 136
    imagery and the selection box, 124
    mouse tracking with boolean gadgets, 136
  close gadget, 119
  complement gadget highlighting, 127, 127
  custom gadgets, 166
  defined, 28
  depth gadget, 119
  disabling, 118, 130
  down, 268
  down message, 259
  drag gadget, 119
  enabling, 118, 130
  EndRefresh(), 128
  EndUpdate(), 128
  Examples
    creating a simple gadget, 120
    scroller support functions, 144
    slider support functions, 145
    string gadget with edit hooks, 162
    updating a string gadget, 151
  FontExtent(), 155
  gadget flags, 122, 124, 127, 128, 128, 134, 154, 157
  gadget imagery, 122
  Gadget Structure, 119
  GadgetID, 134
  gadgets without imagery, 123
  GFLG_DISABLED, 321
  ghosted - see Gadgets disabling
  GMR_MEACTIVE, 321
  GMR_NEXTACTIVE, 321
  GMR_NOREUSE, 321
  GMR_PREVACTIVE, 321
  GMR_REUSE, 321
  GM_GOINACTIVE, 322
  Help key in string gadgets, 158
  highlighting, 118
  highlighting gadgets, 127
  highlighting mutual exclude, 139
  hit-select boolean gadget, 138
  IDCMP Messages, 123-124, 128, 131
  Image Structure, 128
  imageless gadgets for mouse tracking, 123
  implemention of, 318
  in borders, 932
  in new window, 107
  in requester, 204, 206
  in window border, 93
  integer gadget, 150
  Intuition Message classes, 119
  Knob on proportional gadgets, 142
  left mouse button, 118
  Methods, 318
  modifying gadgets, 122
  ModifyProp(), 166
  mutually exclusive, 140
  NewModifyProp(), 147, 148, 166
  ObtainGIRPort(), 323
  OffGadget(), 130, 166
  OnGadget(), 130, 166
  position, 124
  PropInfo flags, 140, 147
  proportional gadget, 118, 140
  proportional gadget container, 142
  proportional gadget increment, 144
  proportional gadget knob, 142
  RefreshGadgets(), 166
  RefreshGList(), 128, 129, 130, 166
  refreshing gadgets, 128
  relative position, 124
  relative size, 124
  ReleaseGIRPort(), 323
  RemoveGadget(), 166
  RemoveGList(), 122, 166, 322
  removing a gadget, 121
  screen gadgets, 119
  Scroller, 141, 141
  select box size, 125
  select button, 118
  SetEditHook(), 166
  SGWork editing actions, 160
  SGWork editing operations, 160
  size gadget, 119, 124
  Slider, 141, 142
  SpecialInfo, 134
  string gadget, 118, 148
  string gadget editing, 158
  string gadget modes, 157
  string gadget with an alternate keymap, 156
  struct BoolInfo, 139
  struct Border, 123
  struct Gadget, 132
  struct IntuiMessage, 119
  struct IntuiText, 123
  struct PropInfo, 143, 144, 147
  struct SGWork, 159
  struct StringExtend, 157
  struct StringInfo, 154, 155
  system gadgets, 77, 91, 119
  text gadget, 118
  text justification, 154
  toggle-select boolean gadget, 138
  types of gadgets, 133, 138
  up, 268
  up message, 259
  UserData, 134
  using relative positioning, 125
  window gadgets, 119
  zoom gadget, 119