Bug 165624 Provides UI supports for Highlight rule refer to Style element
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/HighlightRuleBuilder.java
String initValue = null;
		if ( control instanceof Text )
		{
			initValue = ( (Text) control ).getText( );
		}
		else if ( control instanceof Combo )
		{
			initValue = ( (Combo) control ).getText( );
		}
		ExpressionBuilder expressionBuilder = new ExpressionBuilder( getShell( ),
				initValue );
		if ( designHandle != null )
		{
			expressionBuilder.setExpressionProvier( new ExpressionProvider( designHandle ) );
		}
		if ( expressionBuilder.open( ) == OK )
		{
			String result = DEUtil.resolveNull( expressionBuilder.getResult( ) );
			if ( control instanceof Text )
			{
				( (Text) control ).setText( result );
			}
			else if ( control instanceof Combo )
			{
				( (Combo) control ).setText( result );
			}
		}
		updateButtons( );
	}
}