Sets the widget message. When the widget is created
with the style <code>SWT.SEARCH</code>, the message text
is displayed as a hint for the user, indicating the
purpose of the field.
<p>
Note: This operation is a <em>HINT</em> and is not
supported on platforms that do not have this concept.
</p>
@param message the new message
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT - if the message is null</li>
</ul>
@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 widget message. When the widget is created with the style <code>SWT.SEARCH</code>, the message text is displayed as a hint for the user, indicating the purpose of the field. <p> Note: This operation is a <em>HINT</em> and is not supported on platforms that do not have this concept. </p>
@param message the new message
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the message is null</li> </ul> @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 3.3