In any text box in OSX, the up and down arrows move the cursor up or down a line, as expected. On the last line, though, pressing the down arrow behaves like the "End" key, moving the cursor to the end of the line. Similarly, on the first line, the up arrow moves the cursor to the beginning of the line.
I've started using Windows 8, in which the up and down arrows still attempt to go up or down a line, regardless of where the cursor is in the document, and I'd like to, if it's possible, make Windows mimic OSX.
My gut tells me that, if this can even be done, it'll probably be through AutoHotKey, but I haven't been able to find a way to identify when I'm at the bottom of a text box. Is there some way to do that? Some other, non-AHK method that would do it?