History / History of Rosochowaciec and Denysow [3]

Hi....I am trying to find a brief history of area's Rosochowaciec and Denysow please. Where they towns in Poland that are now in Ukraine? I have family history to Lvov, Rosochowciec and Denysow and am having trouble understanding the history from 1900-1940. Any links would be appreciated. Thank you in advance!