Sets whether or not the receiver is 'locked'. When a coolbar
is locked, its items cannot be repositioned.
@param locked lock the coolbar if true, otherwise unlock the coolbar
@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 whether or not the receiver is 'locked'. When a coolbar is locked, its items cannot be repositioned.
@param locked lock the coolbar if true, otherwise unlock the coolbar
@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 2.0