I have a UserControl which has a style, that i would like to be influenced by a settings checkbox on the main window hosting my user control

so myControl.xaml has a Style which i would like to have a trigger, that should observe a CheckBox inside MainWindow.xaml

i know one way to do this, would be to create a local property in myControl.cs which would look at the property in MainWindow.cs which would in turn return state of that cheeckbox.. but maybe there is a way to do this w/out writing any c# code ?