Customization in WS 11.4 UI


I was browsing through the path WorldServer\tomcat\webapps\ws\resources\www-built\sdk to check the controls provided. I could only find controls for buttons. So if my understanding is correct is it something that as of now we can create only buttons in the project and task page? Is the support also provided to create a text box or labels or other UI features that exist in HTML?

Many Thanks