Creating a Flex Tree with variable height rows can be mysteriously difficult if you are new to Flex item renderers. This cookbook will give you the step by step instructions to creating a Tree control with variable height renderers.

Creating a datagrid with no column or row seperator lines is just a matter of creating a new DataGrid skin and applying it to the DataGrid.

Styling a Flex 4 Alert is simply a matter of creating a new style and applying it to the Alert object

See how you can change the letter spacing on the Spark Button control in Flex 4

See how you can set the accent color on the Spark Button control’s emphasized state in Flex 4

See how you can set the close button skin on the Spark TitleWindow container in Flex 4

See ow you can create a multiline Spark CheckBox control in Flex 4

See how you can create a Spark Panel container with a semi-transparent title bar

See how you can create a non-editable Spark NumericStepper control

See how you can wrap values in a Spark NUmericStepper control in Flex 4