求大神帮忙windows程序设计的问题（用visual studio）编写Windows窗口应用程序实现对话框与菜单的应用

完整代码：https://download.csdn.net/download/caozhy/11170019

// Q760642.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "commdlg.h"
#include "Q760642.h"

#define MAX_LOADSTRING 100

LRESULT CALLBACK NewWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

// Global Variables:
HINSTANCE hInst;                                // current instance
TCHAR szTitle[MAX_LOADSTRING];                  // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];            // the main window class name
HWND hWnd;
HWND newdlghWnd;
HBRUSH hmainBrush = NULL;
// Forward declarations of functions included in this code module:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: Place code here.
    MSG msg;
    HACCEL hAccelTable;

    // Initialize global strings
    LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadString(hInstance, IDC_Q760642, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    // Perform application initialization:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_Q760642));

    // Main message loop:
    while (GetMessage(&msg, NULL, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            if (!IsDialogMessage(newdlghWnd, &msg)) 
            {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }

        }
    }

    return (int) msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage are only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_Q760642));
    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = MAKEINTRESOURCE(IDC_Q760642);
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{

   hInst = hInstance; // Store instance handle in our global variable
   newdlghWnd = NULL;
   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

HBRUSH CHColor()
{
    CHOOSECOLOR cc;                 // common dialog box structure 
    static COLORREF acrCustClr[16]; // array of custom colors 
    HBRUSH hbrush;                  // brush handle
    static DWORD rgbCurrent;        // initial color selection

    // Initialize CHOOSECOLOR 
    ZeroMemory(&cc, sizeof(cc));
    cc.lStructSize = sizeof(cc);
    cc.hwndOwner = hWnd;
    cc.lpCustColors = (LPDWORD) acrCustClr;
    cc.rgbResult = rgbCurrent;
    cc.Flags = CC_FULLOPEN | CC_RGBINIT;

    if (ChooseColor(&cc)==TRUE) 
    {
        hbrush = CreateSolidBrush(cc.rgbResult);
        rgbCurrent = cc.rgbResult; 
        return hbrush;
    }
    return NULL;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND  - process the application menu
//  WM_PAINT    - Paint the main window
//  WM_DESTROY  - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;
    MSG msg;
    switch (message)
    {
    case WM_COMMAND:
        wmId    = LOWORD(wParam);
        wmEvent = HIWORD(wParam);
        // Parse the menu selections:
        switch (wmId)
        {
        case IDM_FILE_NEW:
            if (newdlghWnd == NULL)
                newdlghWnd = CreateDialog(hInst, (LPCTSTR)IDD_DIALOG1, hWnd, (DLGPROC)NewWndProc);       
            ShowWindow(newdlghWnd, SW_SHOW);
            SetForegroundWindow(newdlghWnd);
            UpdateWindow(newdlghWnd);
            break;
        case IDM_COLOR:
            {
                HBRUSH hb = CHColor();
                if (hb != NULL) hmainBrush = hb;
                InvalidateRect(hWnd, NULL, TRUE);
            }
            break;
        case IDM_ABOUT:
            DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
            break;
        case IDM_EXIT:
            DestroyWindow(hWnd);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        // TODO: Add any drawing code here...
        RECT rc;
        GetClientRect(hWnd, &rc);
        if (hmainBrush != NULL)
        FillRect(hdc,&rc,(HBRUSH)hmainBrush);
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}


LRESULT CALLBACK NewWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    wchar_t * cppf = _T("C++ File");
    wchar_t * hf = _T("Header File");
    switch (message)
    {
        case WM_INITDIALOG:
            SendDlgItemMessage(hWnd, IDC_LIST1, LB_ADDSTRING, 0,(LPARAM)cppf);
            SendDlgItemMessage(hWnd, IDC_LIST1, LB_ADDSTRING, 0,(LPARAM)hf);
            break;
        case WM_COMMAND:
            wmId    = LOWORD(wParam);
            wmEvent = HIWORD(wParam);
            switch (wmId)
            {
                case IDOK:
                    DestroyWindow(newdlghWnd);
                    newdlghWnd = NULL;
                    break;
            }
            break;
        case WM_CLOSE:
            DestroyWindow(newdlghWnd);
            newdlghWnd = NULL;
            break;
        case WM_DESTROY:
            break;
        default:
            return FALSE;
    }
    return TRUE;
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    UNREFERENCED_PARAMETER(lParam);
    switch (message)
    {
    case WM_INITDIALOG:
        return (INT_PTR)TRUE;

    case WM_COMMAND:
        if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
        {
            EndDialog(hDlg, LOWORD(wParam));
            return (INT_PTR)TRUE;
        }
        break;
    }
    return (INT_PTR)FALSE;
}