[Supportic]

Thank you for your reply.

This is not what I really wanted but I solved it now with the following code:

local UAN = UniqueAddonName
local SM = SCENE_MANAGER
 
function UAN.ToogleToolbox()
  local window = MyBox
 
  -- toogles the window
  window:SetHidden(not window:IsHidden())
  
  -- hide the scene "hudui" when the BtnClose is pressed in the "hudui" scene
  if window:IsHidden() and SM:GetCurrentScene():GetName() == "hudui" then
    ZO_SceneManager_ToggleHUDUIBinding()
  end
end

My problem was that the scene "hudui" would stay active when I closed the box via a button. When I close the box I expect to go back to the "hud" scene that's why I need to toggle the "hudui" scene to the "hud" scene.

Ingame you can observe the current scene with this command:

/script d(SCENE_MANAGER:GetCurrentScene():GetName())