erated during drag, sent to object with mouse grab
 *		Game piece erases previous outline
 *		Game piece draws new outline at new pointer position
 * 3.	User releases button
 *	MSG_META_END_SELECT generated, sent to object with mouse grab
 *		Game piece releases gadget exclusive (MSG_VIS_RELEASE_GADGET_EXCL)
 *		MSG_VIS_LOST_GADGET_EXCL generated, sent to mouse grab (game piece)
 *		Game piece erases old outline, if any
 *		Game piece moves itself, erases old bounds, draws new bounds
 *		Game piece releases