Claim on Barony

[Mountainduke]

I have a claim on a Barony of a county that is not mine.
What if I press this claim with war on the duchy ruler an win it, would the Barony within an enemy county be mine? or how would the relation be as the Barony is still within an enemy county?
If I had the chance to try out myself I would but the oppenent is a bit to strong for me.

 

[Divi]

The barony will be yours but the count will have a de jure claim on it.