If orientation is SWT.HORIZONTAL, lay the controls in the SashForm
out side by side. If orientation is SWT.VERTICAL, lay the
controls in the SashForm out top to bottom.
@param orientation SWT.HORIZONTAL or SWT.VERTICAL
@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>
<li>ERROR_INVALID_ARGUMENT - if the value of orientation is not SWT.HORIZONTAL or SWT.VERTICAL
</ul>
If orientation is SWT.HORIZONTAL, lay the controls in the SashForm out side by side. If orientation is SWT.VERTICAL, lay the controls in the SashForm out top to bottom.
@param orientation SWT.HORIZONTAL or SWT.VERTICAL
@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> <li>ERROR_INVALID_ARGUMENT - if the value of orientation is not SWT.HORIZONTAL or SWT.VERTICAL </ul>