It is a style so you have to use setStyle()
________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, July 21, 2008 11:57 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] HBox verticalGap How come when I create an HBox in view mode, it allows verticalGap=30 but when I create an HBox dymanically it says there is no such property movieBox.verticalGap=30; 1119: Access of possibly undefined property verticalGap through a reference with static type mx.containers:HBox. Also, I asked this before and didn't get an answer, Why does the style explorer not have Hbox or Vbox ? http://examples.adobe.com/flex3/consulting/styleexplorer/Flex3StyleExplo rer.html# <http://examples.adobe.com/flex3/consulting/styleexplorer/Flex3StyleExpl orer.html>