fix hello_nacl compile error

visual_studio/NativeClientVSAddIn/InstallerResources/examples/hello_nacl/hello_nacl/hello_nacl.c

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This project demonstrates how to migrate a Windows desktop app to Native
 // Client, running first as a Win32 application (define STEP1), then as a PPAPI
 // plugin (define STEP2 through STEP6), and finally as a Native Client module.
 
 // Start with STEP1 defined and the defines for STEP2 through STEP6 commented
@@ skipping 93 matching lines @@
 PP_Instance myInstance;
 
 int InitInstanceInPCWindow();
 void InitInstanceInBrowserWindow();
 
 #endif
 
 
 #ifdef STEP4
 // Implements message handling in a callback function.
-void HelloWorldCallback(void* user_data, int32_t result) {
+void HelloWorldCallbackFun(void* user_data, int32_t result);
+struct PP_CompletionCallback HelloWorldCallback = {
+   HelloWorldCallbackFun, NULL };
+
+void HelloWorldCallbackFun(void* user_data, int32_t result) {
   MSG uMsg;
   if (PeekMessage(&uMsg, NULL, 0, 0, PM_REMOVE)) {
     TranslateMessage(&uMsg);
     DispatchMessage(&uMsg);
   }
   ppb_core_interface->CallOnMainThread(100, HelloWorldCallback, 0);
 }
-
-struct PP_CompletionCallback HelloWorldCallback = { HelloWorldCallback, NULL };
 #endif
 
 #ifdef STEP2
 // The basic framework needed for all Native Client Modules.  Handles creation
 // of the module instance and initial handshake with the browser.
 /**
  * Creates new string PP_Var from C string. Useful utility for
  * message-handling.
  */
 static struct PP_Var CStrToVar(const char* str) { if (ppb_var_interface !=
@@ skipping 231 matching lines @@
   winClass.hCursor       = LoadCursor(NULL, IDC_ARROW);
   winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
   winClass.lpszMenuName  = NULL;
   winClass.cbClsExtra    = 0;
   winClass.cbWndExtra    = 0;
 
   if (!RegisterClassEx(&winClass))
     return E_FAIL;
 
   g_hWnd = CreateWindowEx(
-      NULL, _T("MY_WINDOWS_CLASS"),
+      0, _T("MY_WINDOWS_CLASS"),
       _T("hello_nacl"), WS_OVERLAPPEDWINDOW,
       0, 0, 640, 480, NULL, NULL, g_hInstance, NULL);
 
   if (g_hWnd == NULL)
     return E_FAIL;
 
   ShowWindow(g_hWnd, 1);
 
   UpdateWindow(g_hWnd);
 
 #ifdef STEP4
   // Skip the message loop, schedule a callback instead to periodically check
   // for messages. Here we schedule at 100ms intervals.
   ppb_core_interface->CallOnMainThread(100, HelloWorldCallback, 0);
   return 0;
 #else
   // Main message loop, Windows style.
   while(uMsg.message != WM_QUIT) {
     if (PeekMessage(&uMsg, NULL, 0, 0, PM_REMOVE)) {
       TranslateMessage( &uMsg );
       DispatchMessage( &uMsg );
     }
   }
   return uMsg.wParam;
 #endif
 
 }
 #endif