How to create Popup-screens

[marky1991]

Does anyone know how to create popup screens? Is it feasible/possible without manually making unity prefabs? (Or does anyone know of an open-source mod that does this? I checked the plib repo (https://github.com/peterhaneve/ONIMods/tree/main/PLibUI), but couldn't find anything similar. I checked how eg the options screen does it, which is this code:

  protected GameObject ActivateChildScreen(GameObject screenPrefab)
  {
    GameObject go = Util.KInstantiateUI(screenPrefab, this.transform.parent.gameObject);
    this.childDialog = go;
    go.Subscribe(476357528, new Action<object>(this.Unhide));
    this.Hide();
    return go;
  }

but I have no idea what the hash in the subscribe call means, I'm guessing it was some sort of constant lost in the decompilation. Plus, I don't have a prefab for my custom screen, so it's not clear to me , but would rather do everything directly via code).

I'm thinking about trying to copy/paste the above, hard-coded hash and all, and see if it works, but I wanted to see if anyone knew better.