Forces the receiver to have the <em>keyboard focus</em>, causing
all keyboard events to be delivered to it.
@return <code>true</code> if the control got focus, and <code>false</code> if it was unable to.
@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>
Forces the receiver to have the <em>keyboard focus</em>, causing all keyboard events to be delivered to it.
@return <code>true</code> if the control got focus, and <code>false</code> if it was unable to.
@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>
@see #setFocus