TTrackBar
pl
OnChange
OnChangeBounds
OnClick
OnContextPopup
OnDragDrop
OnDragOver
OnEndDrag
OnEnter
OnExit
OnMouseDown
OnMouseEnter
OnMouseLeave
OnMouseMove
OnMouseUp
OnKeyDown
OnKeyPress
OnKeyUp
OnResize
OnStartDrag
OnUTF8KeyPress
TCustomTrackBar