[핵심 API로 배우는 윈도우프로그래밍(강경우, 한빛아카데미)] 7장 1번 풀이

#include <Windows.h>
#include<tchar.h>
#include<string.h>
#include<math.h>
#include"resource.h"
//#pragma comment(linker,"/entry:WinMainCRTStartup /subsystem:console")
LRESULT CALLBACK FrameWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
HINSTANCE hInst;
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow)
{
    HWND hwnd;
    MSG msg;
    WNDCLASS WndClass;
 
    hInst = hInstance;
    WndClass.style = CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = FrameWndProc;
    WndClass.cbClsExtra = 0;
    WndClass.cbWndExtra = 0;
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClass.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1);
    WndClass.lpszClassName = _T("Window Class Name");
    RegisterClass(&WndClass);
 
    WndClass.lpfnWndProc = ChildWndProc;
    WndClass.lpszMenuName = NULL;
    WndClass.lpszClassName = _T("Child Window Class Name");
    RegisterClass(&WndClass);
 
    hwnd = CreateWindow(
        _T("Window Class Name"),
        _T("Main Window Title"),
        WS_OVERLAPPEDWINDOW,
        50,
        50,
        1000,
        700,
        NULL,
        NULL,
        hInstance,
        NULL);
 
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
 
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}
 
LRESULT CALLBACK FrameWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
    static HWND hwndClient;
    HWND hwndChild;
 
    CLIENTCREATESTRUCT clientcreate;
    MDICREATESTRUCT mdicreate;
 
    TCHAR str[30];
    static int childnum = 1;
    switch (iMsg)
    {
    case WM_CREATE:
        clientcreate.hWindowMenu = GetSubMenu(GetMenu(hwnd), 0);
        clientcreate.idFirstChild = 100;
        hwndClient = CreateWindow(_T("MDICLIENT"), NULL, WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN,
            0, 0, 0, 0, hwnd, NULL, hInst, (LPSTR)&clientcreate);
        ShowWindow(hwndClient, SW_SHOW);
        break;
    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case ID_FILENEW:
            mdicreate.szClass = _T("Child Window Class Name");
            _stprintf_s(str, 30, _T("%d번 Child Window"), childnum);
            childnum++;
            mdicreate.szTitle = str;
            mdicreate.hOwner = hInst;
            mdicreate.style = 0;
            mdicreate.lParam = 0;
            mdicreate.x = CW_USEDEFAULT;
            mdicreate.y = CW_USEDEFAULT;
            mdicreate.cx = CW_USEDEFAULT;
            mdicreate.cy = CW_USEDEFAULT;
            hwndChild = (HWND)SendMessage(hwndClient, WM_MDICREATE, 0, (LPARAM)(LPMDICREATESTRUCT)&mdicreate);
            break;
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
 
    }
    return DefFrameProc(hwnd, hwndClient, iMsg, wParam, lParam);
}
LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
    switch (iMsg)
    {
    case WM_CREATE:
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return DefMDIChildProc(hwnd, iMsg, wParam, lParam);
}