MID Win32 消息没有做

// SMD_001.cpp : 定义应用程序的入口点。
//
//将子窗体赋值设置为Parent为父窗体，系统自己避免窗体移动出去。这个时候坐标以父窗体客户区00开始。
#include "stdafx.h"
#include "SMD_001.h"

#define MAX_LOADSTRING 100

// 全局变量:
HINSTANCE hInst;								// 当前实例
TCHAR szTitle[MAX_LOADSTRING];					// 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING];			// 主窗口类名

// 此代码模块中包含的函数的前向声明:
ATOM				MyRegisterClass(HINSTANCE hInstance);
ATOM			   MyRegisterClassClild(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK	About(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK WndProcChild(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

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

    // TODO: 在此放置代码。
    MSG msg;
    HACCEL hAccelTable;

    // 初始化全局字符串
    LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadString(hInstance, IDC_SMD_001, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);
    MyRegisterClassClild(hInstance);
    // 执行应用程序初始化:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_SMD_001));

    // 主消息循环:
    while (GetMessage(&msg, NULL, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}



//
//  函数: MyRegisterClass()
//
//  目的: 注册窗口类。
//
//  注释:
//
//    仅当希望
//    此代码与添加到 Windows 95 中的“RegisterClassEx”
//    函数之前的 Win32 系统兼容时，才需要此函数及其用法。调用此函数十分重要，
//    这样应用程序就可以获得关联的
//    “格式正确的”小图标。
//
ATOM MyRegisterClassClild(HINSTANCE hInstance)
{
    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style			= CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc	= WndProcChild;
    wcex.cbClsExtra		= 0;
    wcex.cbWndExtra		= 0;
    wcex.hInstance		= hInstance;
    wcex.hIcon			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_SMD_001));
    wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_SMD_001);
    wcex.lpszClassName	= _T("client");
    wcex.hIconSm		= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassEx(&wcex);
}

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_SMD_001));
    wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground	= (HBRUSH)(COLOR_APPWORKSPACE+1);
    wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_SMD_001);
    wcex.lpszClassName	= szWindowClass;
    wcex.hIconSm		= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassEx(&wcex);
}

//
//   函数: InitInstance(HINSTANCE, int)
//
//   目的: 保存实例句柄并创建主窗口
//
//   注释:
//
//        在此函数中，我们在全局变量中保存实例句柄并
//        创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
    HWND hWnd;

    hInst = hInstance; // 将实例句柄存储在全局变量中

    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;
}

//
//  函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  目的: 处理主窗口的消息。
//
//  WM_COMMAND	- 处理应用程序菜单
//  WM_PAINT	- 绘制主窗口
//  WM_DESTROY	- 发送退出消息并返回
//
//
LRESULT CALLBACK WndProcChild(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    return DefWindowProc(hWnd,message,wParam,lParam);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;
    static char title[][10]={"1","2","3","4","5"};
    static int index =0;
    static HWND hClient[100];
    switch (message)
    {
    case WM_CREATE:
        hClient[index] = CreateWindowA("Client",title[index],WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN|WS_CHILD|WS_VISIBLE,0,0,CW_USEDEFAULT,CW_USEDEFAULT,hWnd,HMENU(index),GetModuleHandle(NULL),NULL);//子窗体设置了WS_VISIBL不用show和Update可以显示。但是主窗体不可以
        index++;
        break;
    case WM_COMMAND:
        wmId    = LOWORD(wParam);
        wmEvent = HIWORD(wParam);
        // 分析菜单选择:
        switch (wmId)
        {
        case IDM_ABOUT:
            DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
            break;
        case IDM_EXIT:
            DestroyWindow(hWnd);
            break;
        case ID_32771:
            SendMessage(hWnd,WM_CREATE,NULL,NULL);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
        }
        break;
    case WM_SIZE:
        {


            int cx = LOWORD(lParam);
            int cy = HIWORD(lParam);
            for(int i =0;i<100;i++)
            {
                if(hClient[i]==NULL) break;
                else
                {
                    MoveWindow(hClient[i],0,0,cx,cy,TRUE);
                }
            }
        }
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        // TODO: 在此添加任意绘图代码...
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

// “关于”框的消息处理程序。
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;
}