For an example of multiline Spark RadioButton control with a vertically aligned radio button circle, see “Creating a multiline Spark RadioButton control in Flex 4″.

It is basically the default Spark RadioButton skin, but I had to make two minor adjustments:
(1) To enable multiline labels, I removed the maxDisplayedLines property.
(2) To vertically align the radio button dot, I had to change this line (~line 89 in the default RadioButtonSkin.mxml):

<s:Group verticalCenter="0" width="13" height="13">

With this line:

<s:Group top="5" width="13" height="13">

Hope that helps,
Peter

i am able to create multiline radio button.
but my problem is i need to place that radio button visuval component i.e circle at 1st line

i had 3 lines of text i need to place that radio button circle at 1st line

please help me to solve this problem

Regards
Mahesh

The namespace was renamed after beta 2 (in 4.0.0.12635, to be exact). For more information, see “The Flex 4 ‘halo’ namespace is now the ‘mx’ namespace”.

Peter