Global Coordinate Value on Mouse Click in Flex

In Flex, I am using the following code:

I am using event.event.localX to get the x-axis but it is with reference to local coordinates. How can I get or pass the value of the HBox's xAxis that is clicked by the user so th开发者_如何转开发at I can add it in the xAxis of the local coordinate.

In other words, I need the global coordinate value? (i.e. x-axis & y-axis)

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MouseEvent has stageX and stageY properties.