Probably you would have to get the 'CurrentPoint' from the figure and compare this against the 'Position' property of the edit box. If the edit box is parented by some panel inside the figure then you would have to go a layer deeper and get the position of the panel and then the position of the edit box within the panel.
Since you would presumably need to test this a lot you can obviously calculate the position of the edit box relative to the figure (if it is inside a parent panel) and store it so that you can test the 'CurrentPoint' against it quickly.
In terms of actually putting text at a specific location within an edit box though I don't think this is possible (maybe using java) as you just set the 'String' property of the edit box and do not have control over its positioning within the edit box.
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