flex - create HBox component with default values -

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I want to create an HBox component; For example, HLBox that actually behaves like a HBox but its default width and height is 100%.

How can I do this?

Create a HLBox.mxml file and add the following code to it. 

  & lt ;! - HLBox.mxml - & gt; & Lt; Mx: HBox xmlns: mx = "http://www.adobe.com/2006/mxml" width = "100%" height = "100%" /> Use

and HLBox as you HBox 

  & lt; HLBox & gt; & Lt ;! - Do not specify the width or height attributes for the HLBox tag, it will overwrite the default - & gt; & Lt; Mx: label text = "something" /> & Lt ;! - Other children - & gt; & Lt; / HLBox & gt;

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