Changes the appearance of the line used to draw the rectangles.
@param stippled <code>true</code> if rectangle should appear stippled
@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>
Changes the appearance of the line used to draw the rectangles.
@param stippled <code>true</code> if rectangle should appear stippled
@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>