Urho with External Window (mouse stop working)

When I use Urho with external window, mouse stop working. I am not sure why, but I guess external window not send mouse in to urho?

Keyboard is working. I use WPF as external window, therefore if you know Windows only solution it never mind.

I found solution. I use Urho example from wikipedia and there is

if (!GetSubsystem<Input>()->IsMouseVisible()) { ... }

I only guess, if Urho use external window, GetSubsystem<Input>()->IsMouseVisible() is allways true and therefore code inside this if never happens. Therefore changing under Urho MouseVisibility never go false.