I think you have to do it with the help of lua. But i just don't know how
"VGameScrollDirectionHorizontal" - with this parameter you can query the scrolling position. "VGameScrollPosition" gives you the upper-left point of the current scrolling position. "GameCursorHorizontalScrollDistance" gives you the amount of pixel to the area of the picture, where the scrolling starts. With "getCursorPos()" you get the current position of the cursor.
So there are different possibilities how to handle this.