I'm trying to add mouseenter handler to one of the control (PlanningCalendarAppointment). Thats what i have tried already.
control.attachEvent("mouseenter", function () {
console.log("test"); // Fixed compilation error
});
but it doesnt give any effects.
Please try .attachBrowserEvent instead of attachEvent:
control.attachBrowserEvent("mouseenter", function () {
console.log("test"); // Fixed compilation error
});