Returns the receiver's style information.
<p>
Note that the value which is returned by this method <em>may
not match</em> the value which was provided to the constructor
when the receiver was created. This can occur when the underlying
operating system does not support a particular combination of
requested styles. For example, if the platform widget used to
implement a particular SWT widget always has scroll bars, the
result of calling this method would always have the
<code>SWT.H_SCROLL</code> and <code>SWT.V_SCROLL</code> bits set.
</p>
@return the style bits
@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 receiver's style information. <p> Note that the value which is returned by this method <em>may not match</em> the value which was provided to the constructor when the receiver was created. This can occur when the underlying operating system does not support a particular combination of requested styles. For example, if the platform widget used to implement a particular SWT widget always has scroll bars, the result of calling this method would always have the <code>SWT.H_SCROLL</code> and <code>SWT.V_SCROLL</code> bits set. </p>
@return the style bits
@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>