I created labels for layer in according with [this example][1]
But they display coded value description from domain. I can resolve it manually by unchecking this option "Layer's Properties -> Labels -> Expression... -> Display coded value description" !["Layer's Properties -> Labels -> Expression... -> Display coded value description"][2]

How can I do that programmatically with ArcObjects 10+?

 [1]: https://gis.stackexchange.com/questions/6160/change-the-label-field-in-geofeaturelayer
 [2]: https://community.esri.com/servlet/JiveServlet/downloadImage/2-664876-317930/20170208.png