A message is a widget with 2 elements:

• an icon
• a text message

Here you’ve a screenshot with the “warning” icon:

• setIcon(”name of the icon”)
• setValue(”text to display”)

$this->build("p4a_message", "message");
 
// this is not necessary, the default icon is warnig
// you can also set "info" or "error"
$this->message->setIcon("warning");
 
// this is not necessary, the default value is true
// but you can also turn autoClear(false)
// with autoClear on the message will reset his value
// after the output.
$this->message->autoClear(true);
 
// set the text
$this->message->setValue("Please fill all required fields");