（转载）Win32 SDK编程系列文章——菜单(快捷菜单)——动态加载

#define IDC_MYICON                      2
#define IDD_SDKPOPUPMENU_DIALOG         102
#define IDS_APP_TITLE                   103
#define IDD_ABOUTBOX                    103
#define IDI_SDKPOPUPMENU                107
#define IDI_SMALL                       108
#define IDC_SDKPOPUPMENU                109
#define IDR_MAINFRAME                   128
#define IDM_MAIN                        0x2000
#define IDA_MAIN                        0x2000
#define IDM_OPEN                        0x4101
#define IDM_OPTION                      0x4102
#define IDM_EXIT                        0x4103
#define IDM_SETFONT                     0x4201
#define IDM_SETCOLOR                    0x4202
#define IDM_INACT                       0x4203
#define IDM_GRAY                        0x4204
#define IDM_BIG                         0x4205
#define IDM_SMALL                       0x4206
#define IDM_LIST                        0x4207
#define IDM_DETAIL                      0x4208
#define IDM_TOOLBAR                     0x4209
#define IDM_TOOLBARTEXT                 0x4210
#define IDM_INPUTBAR                    0x4211
#define IDM_STATUSBAR                   0x4212
#define IDM_HELP                        0x4301
#define IDM_ABOUT                       0x4302 

TCHAR szClassName[] = L"Menu Example";
TCHAR szCaptionMain[] = L"menu";
TCHAR szMenuHelp[] = L"帮助主题(&H)";  
TCHAR szMenuAbout[] = L"关于本程序(&A)..."; 
HWND g_hWinMain;
HMENU g_hMenu;
HMENU g_hSubMenu;
void DisplayMenuItem(DWORD dwCommandID)
{
    TCHAR szBuffer[256] = {0};
    wsprintf(szBuffer, L"您选择了菜单命令：%08x",dwCommandID);
    MessageBox(g_hWinMain,szBuffer, L"菜单选择",MB_OK);
}  
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // 将实例句柄存储在全局变量中 
   g_hMenu = LoadMenu(hInstance,MAKEINTRESOURCE(IDM_MAIN));//加载菜单资源，返回菜单句柄
   g_hSubMenu = GetSubMenu(g_hMenu,1); //获取主菜单的第2个子菜单，用作快捷菜单
   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, g_hMenu, hInstance, NULL);//把菜单放到窗口中
   g_hWinMain=hWnd;
   if (!hWnd)
   {
      return FALSE;
   }
   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);
   return TRUE;
} 
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;
    POINT stPos;
    HMENU hSysMenu;
    switch (message)
    {
    case WM_CREATE:
        hSysMenu = GetSystemMenu(hWnd,FALSE);//获取系统菜单句柄
        AppendMenu(hSysMenu,MF_SEPARATOR,0,NULL);//把分割线附加到系统菜单中
        AppendMenu(hSysMenu,0,IDM_HELP,szMenuHelp);//把菜单项help附加到系统菜单中
        AppendMenu(hSysMenu,0,IDM_ABOUT,szMenuAbout);//把菜单项about附加到系统菜单中
        break;
    case WM_COMMAND: //用户菜单项命令的消息
        DisplayMenuItem(wParam);//显示对话框
        //对于单项项的标识(单项，双选)的标识
        if(LOWORD(wParam) == IDM_EXIT)
        {
            DestroyWindow(hWnd); 
        } 
        else if(LOWORD(wParam) >= IDM_TOOLBAR &&    LOWORD(wParam) <= IDM_STATUSBAR) //多选的  工具栏的：标准按钮，命令栏，文字标签   
        {
            UINT uState = GetMenuState(g_hMenu,LOWORD(wParam),MF_BYCOMMAND);
            if(uState == MF_CHECKED)
                uState = MF_UNCHECKED;
            else
                uState = MF_CHECKED;
            CheckMenuItem(g_hMenu,LOWORD(wParam),uState);//复选或撤销指定菜单的菜单条目
        }
        else if(LOWORD(wParam) >= IDM_BIG && LOWORD(wParam) <= IDM_DETAIL)//单选的  大图标，小图标，列表，详细资料
        {
            CheckMenuRadioItem(g_hMenu,IDM_BIG,IDM_DETAIL,LOWORD(wParam),MF_BYCOMMAND);//单选[IDM_BIG,IDM_DETAIL]中的一个
        }
        //CheckMenuItem，CheckMenuRadioItem分别用于改变菜单项的状态。菜单项的状态可以通过GetMenuState函数获得。
        break;
    case WM_SYSCOMMAND://系统菜单项的命令消息
        if(LOWORD(wParam) == IDM_HELP || LOWORD(wParam) == IDM_ABOUT)//附加到系统菜单的help，about的菜单项
            DisplayMenuItem(wParam);
        else
            return DefWindowProc(hWnd,message,wParam,lParam);
        break;
    case WM_RBUTTONDOWN:
        GetCursorPos(&stPos);//获取光标位置
        TrackPopupMenu(g_hSubMenu,TPM_LEFTALIGN,stPos.x,stPos.y,NULL,hWnd,NULL);//在指定位置显示快捷菜单，并跟踪菜单选项
        break; 
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps); 
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}