Hi WendyCh. Sorry about the brevity of my last response. I
was in a bit of a hurry. I've had a further look at things and have
decided that the best way to achieve your aim is not with a HTML
Help Control. Instead, position the cursor where you want your
button to be, go into the Truecode tab and paste the following
there:
<input type=button value="Close Window"
onClick="window.close()">
Then, save, compile and test. Let us know how you get
on.