method sendMessage

This method sends a message event to be delivered to a box. The box must implement an on:message handler to receive. NOTE: The payload dictionary is available by accessing the paramsDictionary property on the event.

function onSample()
{
    var myBox = scene.getBoxById("myBox");
    if (myBox)
    {
        var dict = shell.serviceManager.basics.dictionary;
        if (dict)
        {
            dict.setValueForKey("sampleItem", "item");
            myBox.sendMessage("myMessage", dict);
        }
    }
}

// when box receives a message.
function onMessage()
{
    var eventObj = shell.currentEvent;
    if (eventObj)
    {
        // Get the payload.
        var dictionary = eventObj.paramsDictionary;
        if (dictionary)
        {
            // Do something.
        }
    }
}