Scrolls whatever container of the Text text range so it becomes visible on the screen at a given position.
a pointer to the Text object on which to operate.
a int indicating the start of the desired text range.
a int indicating the first character past the desired range.
a CoordType indicating whether the coordinates are relative to the screen, to the window, or to the parent object.
the x coordinate of the point to reach
the y coordinate of the point to reach