Returns a <code>Point</code> whose x coordinate is the start
of the selection in the receiver's text field, and whose y
coordinate is the end of the selection. The returned values
are zero-relative. An "empty" selection as indicated by
the the x and y coordinates having the same value.
@return a point representing the selection start and end
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
Returns a <code>Point</code> whose x coordinate is the start of the selection in the receiver's text field, and whose y coordinate is the end of the selection. The returned values are zero-relative. An "empty" selection as indicated by the the x and y coordinates having the same value.
@return a point representing the selection start and end
@exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul>