diff --git a/Facepunch.Steamworks/Generated/Interfaces/ISteamParties.cs b/Facepunch.Steamworks/Generated/Interfaces/ISteamParties.cs
new file mode 100644
index 0000000..e424e1d
--- /dev/null
+++ b/Facepunch.Steamworks/Generated/Interfaces/ISteamParties.cs
@@ -0,0 +1,172 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using Steamworks.Data;
+
+
+namespace Steamworks
+{
+	internal class ISteamParties : SteamInterface
+	{
+		public ISteamParties( bool server = false ) : base( server )
+		{
+		}
+		
+		public override string InterfaceName => "SteamParties002";
+		
+		public override void InitInternals()
+		{
+			_GetNumActiveBeacons = Marshal.GetDelegateForFunctionPointer<FGetNumActiveBeacons>( Marshal.ReadIntPtr( VTable, 0) );
+			_GetBeaconByIndex = Marshal.GetDelegateForFunctionPointer<FGetBeaconByIndex>( Marshal.ReadIntPtr( VTable, 8) );
+			_GetBeaconDetails = Marshal.GetDelegateForFunctionPointer<FGetBeaconDetails>( Marshal.ReadIntPtr( VTable, 16) );
+			_JoinParty = Marshal.GetDelegateForFunctionPointer<FJoinParty>( Marshal.ReadIntPtr( VTable, 24) );
+			_GetNumAvailableBeaconLocations = Marshal.GetDelegateForFunctionPointer<FGetNumAvailableBeaconLocations>( Marshal.ReadIntPtr( VTable, 32) );
+			_GetAvailableBeaconLocations = Marshal.GetDelegateForFunctionPointer<FGetAvailableBeaconLocations>( Marshal.ReadIntPtr( VTable, 40) );
+			_CreateBeacon = Marshal.GetDelegateForFunctionPointer<FCreateBeacon>( Marshal.ReadIntPtr( VTable, 48) );
+			_OnReservationCompleted = Marshal.GetDelegateForFunctionPointer<FOnReservationCompleted>( Marshal.ReadIntPtr( VTable, 56) );
+			_CancelReservation = Marshal.GetDelegateForFunctionPointer<FCancelReservation>( Marshal.ReadIntPtr( VTable, 64) );
+			_ChangeNumOpenSlots = Marshal.GetDelegateForFunctionPointer<FChangeNumOpenSlots>( Marshal.ReadIntPtr( VTable, 72) );
+			_DestroyBeacon = Marshal.GetDelegateForFunctionPointer<FDestroyBeacon>( Marshal.ReadIntPtr( VTable, 80) );
+			_GetBeaconLocationData = Marshal.GetDelegateForFunctionPointer<FGetBeaconLocationData>( Marshal.ReadIntPtr( VTable, 88) );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate uint FGetNumActiveBeacons( IntPtr self );
+		private FGetNumActiveBeacons _GetNumActiveBeacons;
+		
+		#endregion
+		internal uint GetNumActiveBeacons()
+		{
+			return _GetNumActiveBeacons( Self );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate PartyBeaconID_t FGetBeaconByIndex( IntPtr self, uint unIndex );
+		private FGetBeaconByIndex _GetBeaconByIndex;
+		
+		#endregion
+		internal PartyBeaconID_t GetBeaconByIndex( uint unIndex )
+		{
+			return _GetBeaconByIndex( Self, unIndex );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		[return: MarshalAs( UnmanagedType.I1 )]
+		private delegate bool FGetBeaconDetails( IntPtr self, PartyBeaconID_t ulBeaconID, ref SteamId pSteamIDBeaconOwner, ref SteamPartyBeaconLocation_t pLocation, StringBuilder pchMetadata, int cchMetadata );
+		private FGetBeaconDetails _GetBeaconDetails;
+		
+		#endregion
+		internal bool GetBeaconDetails( PartyBeaconID_t ulBeaconID, ref SteamId pSteamIDBeaconOwner, ref SteamPartyBeaconLocation_t pLocation, StringBuilder pchMetadata, int cchMetadata )
+		{
+			return _GetBeaconDetails( Self, ulBeaconID, ref pSteamIDBeaconOwner, ref pLocation, pchMetadata, cchMetadata );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate SteamAPICall_t FJoinParty( IntPtr self, PartyBeaconID_t ulBeaconID );
+		private FJoinParty _JoinParty;
+		
+		#endregion
+		internal async Task<JoinPartyCallback_t?> JoinParty( PartyBeaconID_t ulBeaconID )
+		{
+			return await JoinPartyCallback_t.GetResultAsync( _JoinParty( Self, ulBeaconID ) );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		[return: MarshalAs( UnmanagedType.I1 )]
+		private delegate bool FGetNumAvailableBeaconLocations( IntPtr self, ref uint puNumLocations );
+		private FGetNumAvailableBeaconLocations _GetNumAvailableBeaconLocations;
+		
+		#endregion
+		internal bool GetNumAvailableBeaconLocations( ref uint puNumLocations )
+		{
+			return _GetNumAvailableBeaconLocations( Self, ref puNumLocations );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		[return: MarshalAs( UnmanagedType.I1 )]
+		private delegate bool FGetAvailableBeaconLocations( IntPtr self, ref SteamPartyBeaconLocation_t pLocationList, uint uMaxNumLocations );
+		private FGetAvailableBeaconLocations _GetAvailableBeaconLocations;
+		
+		#endregion
+		internal bool GetAvailableBeaconLocations( ref SteamPartyBeaconLocation_t pLocationList, uint uMaxNumLocations )
+		{
+			return _GetAvailableBeaconLocations( Self, ref pLocationList, uMaxNumLocations );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate SteamAPICall_t FCreateBeacon( IntPtr self, uint unOpenSlots, ref SteamPartyBeaconLocation_t pBeaconLocation, string pchConnectString, string pchMetadata );
+		private FCreateBeacon _CreateBeacon;
+		
+		#endregion
+		internal async Task<CreateBeaconCallback_t?> CreateBeacon( uint unOpenSlots,  /* ref */ SteamPartyBeaconLocation_t pBeaconLocation, string pchConnectString, string pchMetadata )
+		{
+			return await CreateBeaconCallback_t.GetResultAsync( _CreateBeacon( Self, unOpenSlots, ref pBeaconLocation, pchConnectString, pchMetadata ) );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate void FOnReservationCompleted( IntPtr self, PartyBeaconID_t ulBeacon, SteamId steamIDUser );
+		private FOnReservationCompleted _OnReservationCompleted;
+		
+		#endregion
+		internal void OnReservationCompleted( PartyBeaconID_t ulBeacon, SteamId steamIDUser )
+		{
+			_OnReservationCompleted( Self, ulBeacon, steamIDUser );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate void FCancelReservation( IntPtr self, PartyBeaconID_t ulBeacon, SteamId steamIDUser );
+		private FCancelReservation _CancelReservation;
+		
+		#endregion
+		internal void CancelReservation( PartyBeaconID_t ulBeacon, SteamId steamIDUser )
+		{
+			_CancelReservation( Self, ulBeacon, steamIDUser );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		private delegate SteamAPICall_t FChangeNumOpenSlots( IntPtr self, PartyBeaconID_t ulBeacon, uint unOpenSlots );
+		private FChangeNumOpenSlots _ChangeNumOpenSlots;
+		
+		#endregion
+		internal async Task<ChangeNumOpenSlotsCallback_t?> ChangeNumOpenSlots( PartyBeaconID_t ulBeacon, uint unOpenSlots )
+		{
+			return await ChangeNumOpenSlotsCallback_t.GetResultAsync( _ChangeNumOpenSlots( Self, ulBeacon, unOpenSlots ) );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		[return: MarshalAs( UnmanagedType.I1 )]
+		private delegate bool FDestroyBeacon( IntPtr self, PartyBeaconID_t ulBeacon );
+		private FDestroyBeacon _DestroyBeacon;
+		
+		#endregion
+		internal bool DestroyBeacon( PartyBeaconID_t ulBeacon )
+		{
+			return _DestroyBeacon( Self, ulBeacon );
+		}
+		
+		#region FunctionMeta
+		[UnmanagedFunctionPointer( CallingConvention.ThisCall )]
+		[return: MarshalAs( UnmanagedType.I1 )]
+		private delegate bool FGetBeaconLocationData( IntPtr self, SteamPartyBeaconLocation_t BeaconLocation, SteamPartyBeaconLocationData eData, StringBuilder pchDataStringOut, int cchDataStringOut );
+		private FGetBeaconLocationData _GetBeaconLocationData;
+		
+		#endregion
+		internal bool GetBeaconLocationData( SteamPartyBeaconLocation_t BeaconLocation, SteamPartyBeaconLocationData eData, StringBuilder pchDataStringOut, int cchDataStringOut )
+		{
+			return _GetBeaconLocationData( Self, BeaconLocation, eData, pchDataStringOut, cchDataStringOut );
+		}
+		
+	}
+}
diff --git a/Generator/CodeWriter/ClassVTable.cs b/Generator/CodeWriter/ClassVTable.cs
index e392fd7..05a6799 100644
--- a/Generator/CodeWriter/ClassVTable.cs
+++ b/Generator/CodeWriter/ClassVTable.cs
@@ -153,6 +153,8 @@ private void WriteFunction( CodeParser.Class clss, CodeParser.Class.Function fun
 			if ( returnType is SteamApiCallType sap )
 			{
 				sap.CallResult = func.CallResult;
+
+				argstr = string.Join( ", ", args.Select( x => x.AsArgument().Replace( "ref ", " /* ref */ " )  ) );
 			}
 
 			WriteLine( $"#region FunctionMeta" );
diff --git a/Generator/CodeWriter/CodeWriter.cs b/Generator/CodeWriter/CodeWriter.cs
index 0a8f599..a78199f 100644
--- a/Generator/CodeWriter/CodeWriter.cs
+++ b/Generator/CodeWriter/CodeWriter.cs
@@ -79,6 +79,7 @@ public void ToFolder( string folder )
 				GenerateVTableClass( "ISteamInventory", $"{folder}../Generated/Interfaces/ISteamInventory.cs" );
 				GenerateVTableClass( "ISteamNetworking", $"{folder}../Generated/Interfaces/ISteamNetworking.cs" );
 				GenerateVTableClass( "ISteamMatchmaking", $"{folder}../Generated/Interfaces/ISteamMatchmaking.cs" );
+				GenerateVTableClass( "ISteamParties", $"{folder}../Generated/Interfaces/ISteamParties.cs" );
 			}
 		}