Add and fix a few stubs to return correct error.

dlls/winsock/socket.c

@@ -4261,7 +4261,8 @@ int WINAPI WSADuplicateSocketA( SOCKET s, DWORD dwProcessId, LPWSAPROTOCOL_INFOA
 int WINAPI WSAInstallServiceClassA(LPWSASERVICECLASSINFOA info)
 {
     FIXME("Request to install service %s\n",debugstr_a(info->lpszServiceClassName));
-    return WSAEACCES;
+    WSASetLastError(WSAEACCES);
+    return SOCKET_ERROR;
 }
 
 /***********************************************************************
@@ -4270,5 +4271,16 @@ int WINAPI WSAInstallServiceClassA(LPWSASERVICECLASSINFOA info)
 int WINAPI WSAInstallServiceClassW(LPWSASERVICECLASSINFOW info)
 {
     FIXME("Request to install service %s\n",debugstr_w(info->lpszServiceClassName));
-    return WSAEACCES;
+    WSASetLastError(WSAEACCES);
+    return SOCKET_ERROR;
+}
+
+/***********************************************************************
+ *              WSARemoveServiceClass                    (WS2_32.70)
+ */
+int WINAPI WSARemoveServiceClass(LPGUID info)
+{
+    FIXME("Request to remove service %p\n",info);
+    WSASetLastError(WSATYPE_NOT_FOUND);
+    return SOCKET_ERROR;
 }

dlls/winsock/ws2_32.spec

@@ -71,7 +71,7 @@
 67  stdcall  WSARecv(long ptr long ptr ptr ptr ptr)
 68  stub     WSARecvDisconnect
 69  stdcall  WSARecvFrom(long ptr long ptr ptr ptr ptr ptr ptr )
-70  stub     WSARemoveServiceClass
+70  stdcall  WSARemoveServiceClass(ptr)
 71  stdcall  WSAResetEvent(long) kernel32.ResetEvent
 72  stdcall  WSASend(long ptr long ptr long ptr ptr)
 73  stdcall  WSASendDisconnect(long ptr)