Thanks for your help and your time, @enchev
What do you mean by the object property? The object has several properties, so I just though the .value property was the one I was supposed to set.
If there's a better, simpler way to handle this, I want to learn it.
Coming from a SQL background rather than a C# background, implementing two partial, custom classes to extend the model does not seem simple. I've read through the link you shared, and I'm trying to wrap my head around how an extended property can ultimately be made to set the single char field in the database for Owner_Shared. Seems easier to me to just take care of it inside the Change event of the switch, but again, I want to learn best practices.
I've created a partial custom class for an extended property I could bind to the switch component
public partial class QbSet
public Boolean OwnerSharedTrueFalse
now if I understand correctly, I also need to create a partial custom class for the xxxServices.cs that handles events? and somehow make that xxxServices.Custom.cs code set the original database Owner_Shared field to "n" when the switch is off?