Entering Window Text

Hi all, and I apologise in advance for what is probably a pretty stupid question.

How do I enter text into a GUI window?

function WindowFunction (windowID : int) {
// Draw any Controls inside the window here
}

I can create the window and put text into the banner, but I'm not sure how to enter the body text. I assume I put text into the space left, my question is simply how? (How should it be typed in?) I'm a bit of a java noob, so it's probably a simple answer.

I'm using code from the unity reference page, but I can't quite understand where I'm supposed to actually put the main text and what syntax to use.

Thanks in advance for any help :)

I'm not really sure what you mean by "body text". A label?

function WindowFunction (windowID : int) {
    GUILayout.Label("Hi");
}