NB: More recent documentation for Dyalog APL is available at https://docs.dyalog.com/20.0/.

ToolControl Events

Close	Create	DragDrop
Configure	ContextMenu	DropFiles
DropObjects	Expose	Help
MouseDown	MouseUp	MouseMove
MouseDblClick	MouseEnter	MouseLeave
MouseWheel	DockStart	DockMove
DockRequest	DockAccept	DockEnd
DockCancel