ks, radio buttons, etc.
</p>

<h4>
	Frame
</h4>

<p>
	Frames are used to position widgets. They are arranged in a stack. When you
	push a frame, all of the consequent widgets will be drawn inside that frame.
	After you are done with a frame, you need to pop it from the frame stack.
</p>

<h4>
	Immediate mode
</h4>

<p>
	This basically means that you call function instead of creating objects to
	manage GUI widgets. For example, the function for creating a button is
	<code>GUI::Button()</code>. Calling this f