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using API = HeathenEngineering.SteamworksIntegration.API;
public static class API.Overlay
The whole of the overlay system is only accessible from the Client API as a result you will always be using the form:

What can it do?

The overlay interface provides simplified access to Steam's overlay features. The Steam Overlay can be used to show web pages, access friends lists, clans,
Overlay Manager
Heathen KB


Game Overlay Activated

Called when the overlay activates or deactivates.

Game Server Change Requested

Called when the user tries to join a different game server from there friends list while the game is running.

Game Lobby Join Requested

Called when the user tries to join a lobby from there friends list or from an invite while the game is running.

Game Rich Presence Join Requested

Called when the user tries to join a game from their friends list or after a user accepts an invite by a friend with userData.InviteToGame(connectString); or API.Friends.Client.InviteUserToGame(user, connectString);.
This callback is made when joining a game. If the user is attempting to join a lobby, then the callback Game Lobby Join Requested will be made.

How To

Enabled and showing

You can check if the Overlay is enabled ... that is ... is the overlay feature turned on for this app for this user.
Debug.Log("yes it is");
Debug.Log("no it is not");
To check if the overlay is currently open you can use
Debug.Log("yes it is");
Debug.Log("no it is not");

Notification positioning

The notification pop up that shows when a user unlocks and achievement or when friends join or leave games can be configured to show in different areas of the screen.
API.Overlay.Client.NotificationPosition =
API.Overlay.Client.NotificationInset = new Vector2Int(0,0);

Activate the overlay

You can activate the overlay in a number of ways.

To a given dialog


To the lobby invite screen


To a game connection


To remote play


To an app store page

API.Overlay.Client.Activate(appId, flag);

To a user dialog

API.Overlay.Client.Activate(dialog, user);

To a web page