openExpression( );
ExpressionBuilder expressionBuilder = new ExpressionBuilder( tocEditor.getText( ) ); expressionBuilder.setExpressionProvier( new ExpressionProvider( dataSetList ) );  if ( expressionBuilder.open( ) == OK ) { tocEditor.setText( expressionBuilder.getResult( ) ); }
			public void widgetSelected( SelectionEvent event )			{				openExpression( );			}