How to identify the control

Hello,

I want to know how to identify the button control from the below xml through code.

I am using QDocElement class to get the rest of the things but dint find any option to know how to identify the control that i am using.

Code:

---

<button>
      <locale language="en-us">
      <buttonText>Hello</buttonText>
      <button window width = "350" height = "100"/>
  </locale>
</button>

---