set VScrollTrack's position(solved)

I meet a problem when I use WordWrap,as follows image"1.jpg".
The VScrollTrack's position is in the bottom of VScroll by default,when the textarea's height is longer than WordWrap's height.
This does not fit people's custom.
So I want to set VScrollTrack's position in the top of VScroll by default,as follows image"2.jpg".
Anybody can solve the problem?

You can select part of text through code to force EditBox scroll there. Try
mEdit->setTextSelection(0, 0);
Edit: Actually you can use not tricky way:mEdit->setTextCursor(0);

The second method is OK after I try above method.
But I want to comet true it in script.
I use as follows:

<Property key="CursorPosition" value="0 0"/>

The result is not OK.
So I want to know whether is there a method to use in script or not.

Problem is once you add text cursor moves. So you should call setTextCursor(0) every time you add text.

P.S. There was typo in LE. CursorPosition is one integer, not two. I fixed that.

Thanks for your reply!