Template file: Home.page
Class file: Home.php
Class file: LabeledTextBox.php
Template file: LabeledTextBox.tpl

/Controls/Samples/LabeledTextBox1/Home.page

<com:TContent ID="body" >
<com:LabeledTextBox
	ID="Input"
	Label.Text="Username" />
<com:TButton
	Text="Submit"
	OnClick="buttonClicked" />
<com:TRequiredFieldValidator
	ControlToValidate="Input.TextBox"
	ErrorMessage="You must enter a value"/>
</com:TContent>