Sets the number of tabs that the CTabFolder should display
@param single <code>true</code> if only the selected tab should be displayed otherwise, multiple tabs will be shown.
@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>
Sets the number of tabs that the CTabFolder should display
@param single <code>true</code> if only the selected tab should be displayed otherwise, multiple tabs will be shown.
@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>
@since 3.0