Point Controller using ScriptUI

Hi all again,

Is there a way to add a button with similar usage to the Point Controller effect to a ScriptUI palette?

I wish to allow the user to select a point in the comp's viewer and get the X, Y values back after interaction -- similar to the Target Icon in most point controllers of most effects.

I saw you can do this with Pseudo Effects... no way to do it using ScriptUI? Or another method?

I tried adding a Point Controller effect to a layer using script and somehow invoking a button press on the Target Icon of the effect - no success here.

Any Ideas?

Thanks a lot

Roy.