Interesting thing I discovered after spending 3 hours pulling my hair out. I’ve been adding Canvas components to a HBox in Flex and needed to draw graphics on the Canvas to render my content. Adding graphics to a Canvas though doesn’t give that Canvas width or height. Make sure you set this manually either as a percentage or to an absolute value to be sure that the canvas dimensions are taken into consideration by other containers. when I get more time I’ll try and demonstrate this along with other techniques for adding Sprites to Flex containers. Things aren’t as straightforward as they seem.