New appointement

[REMI]

Hello, I want open a new tab Appointment in zimbra.
I have see that it's possible for a new message.I think replace "GetComposeController" by "GetCalController" and "NEW_MESSAGE" by "NEW_APPOINTEMENT"... but fail!

function Compose_Mail_Example() {
}

Compose_Mail_Example.prototype = new ZmZimletBase();
Compose_Mail_Example.prototype.constructor = Compose_Mail_Example;

Compose_Mail_Example.prototype.doubleClicked = function() {
    this.singleClicked();
};

Compose_Mail_Example.prototype.singleClicked = function() {
	// Tries to open the compose view on its own.
	var composeController = AjxDispatcher.run("GetComposeController");
	if(composeController) {
		var newWindow = false;
		//to field content
		var to = "a";
		//subject field content
		var subject = "example subject";
		//body content
		var body = "example body";
		var params = {action:ZmOperation.NEW_MESSAGE, inNewWindow:newWindow, 
		toOverride:to, subjOverride:subject, extraBodyText:body, callback:null}
		composeController.doAction(params); // opens asynchronously the window.
	}
};

HELP ME!

Tanks...