Returns the widget text.
<p>
The text for a text widget is the characters in the widget, or
an empty string if this has never been set.
</p>
@return the widget text
@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>
Returns the widget text. <p> The text for a text widget is the characters in the widget, or an empty string if this has never been set. </p>
@return the widget text
@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>