The event handler method receives the following arguments:
sender
A Calendar instance, which is the source of the event. This object will be passed to the handler function as the first argument.
args
A FormEventArgs instance, which contains event data. This object will be passed to the handler function as the second argument.

The following example attaches a handler to the formClose event of a calendar. In the handler method we check if the title of the form that is closed is "Choose a Date". If it is, we do not allow the form to be closed.

JavaScript  Copy Code
// attach a handler - closing of a calendar popup form calendar.formClose.addEventListener(handleFormClose); function handleFormClose(sender, args) {     //the args.form argument is of type BaseForm     if(args.form.headerText = "Choose a Date")       {         //do not allow the form to be closed without a date being set         args.cancel = true;                   } }

Calendar Members
Calendar Class
MindFusion.Scheduling Namespace