DHTMLX is being used in business application for Gasntt charts, treegrid and calendering/scheduler. There is a lot of customization under License environment of dhtmlx and backend integration with .NER MVC 4 or 5. DHTMLS is based on javascript and requires in depth knowledge to customise the tool as per requirement.
JS. angular JS, SQL, MVC 4 or 5, UI skilss, strong programming skills required to customize the software and use it as per requirement.