protected function btnDeleteLeft_Click($strFormId, $strControlId, $strParameter)
{
// Get the left panel's Child Controls
$objChildControls = $this->pnlLeft->GetChildControls();
// Only remove if pnlLeft has at least one control to remove
if (count($objChildControls) > 0) {
// Set the parent of the last control in this array to be NULL,
// essentially removing it from the panel (and the form altogether)
$objChildControls[count($objChildControls) - 1]->SetParentControl(null);
}
}