Steam / OnlineSubsystem Checking DLC ownership

Is there a built-in function inside the Online Subsystem that allows you to check if a user owns DLC? I saw the IOnlineEntitlements interface, but I can’t tell if that’s what I’m looking for.

I just need access to this command:


SteamApps()->BIsDlcInstalled(DLCAppID)

I was wondering the same thing, Does anyone have any information about this.