How Place A CheckBox in Header and tack the Evnet

var obj = new AW.UI.Grid;
    var chkTemplate =     new AW.Templates.Checkbox;
    
    obj.setHeaderText(header);
    obj.setHeaderTemplate(chkTemplate, 0);
    obj.setHeaderValue(false, 0);
    obj.onHeaderValueChanged =
            function(event,index){
                // You have your Event. Best part this does not sort the column as well
                }
        };