Sets the region managed by the argument to the current
clipping region of the receiver.
@param region the region to fill with the clipping region
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT - if the region is null</li>
<li>ERROR_INVALID_ARGUMENT - if the region is disposed</li>
</ul>
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Sets the region managed by the argument to the current clipping region of the receiver.
@param region the region to fill with the clipping region
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the region is null</li> <li>ERROR_INVALID_ARGUMENT - if the region is disposed</li> </ul> @exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>