>I think I will have to increase the height of the edit box once it "hits" the end of the line. Then, I will just set the height to some set value and let the scrollbar "deal" with it.
You might also make it a single line, until the user click on it (or hovers the mouse over it). Then, make it bigger, potentially covering other objects (control the ZOrder).
Since this is all about making the most of screen space, you might also consider just creating a PageFrame, or adding a Page to an existing PageFrame.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)