The most recent version of this documentation can be found at https://docs.dyalog.com/20.0/.

MDIClient Events

Close	Create	DragDrop
Configure	ContextMenu	DropFiles
DropObjects	Expose	Help
KeyPress	GotFocus	LostFocus
MouseDown	MouseUp	MouseMove
MouseDblClick	MouseEnter	MouseLeave
MouseWheel	GestureZoom	GesturePan
GestureRotate	GestureTwoFingerTap	GesturePressAndTap
Select