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

/ActiveControls/Samples/TActiveCheckBoxList/Home.php

<?php

class Home extends TPage
{
	protected function collectSelectionResult($input,$output)
	{
		$indices=$input->SelectedIndices;
		$result='';
		foreach($indices as $index)
		{
			$item=$input->Items[$index];
			$result.="(Index: $index, Value: $item->Value, Text: $item->Text)";
		}
		if($result==='')
			$output->Text='Your selection is empty.';
		else
			$output->Text='Your selection is: '.$result;
	}

	public function selectionChanged($sender,$param)
	{
		$this->collectSelectionResult($this->CheckBoxList,$this->SelectionResult);
	}
}