/*
    ちょっとお試し Windows program sample 2
 */

#include <windows.h>
#include "resource.h"

static HINSTANCE  app_hinst;

static LRESULT CALLBACK winMainProc(HWND hWnd, UINT msg, UINT wParam, LONG lParam);
static LRESULT CALLBACK winMainAboutDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);


int WINAPI WinMain(HINSTANCE hInst, HINSTANCE dummy_hPrevInst, LPSTR dummy_lpCmdLine, int nCmdShow)
{
    /* ここより始まる */
    char        *app_name = "WinProg. sample no.2.";        /*プログラムの名前*/
    WNDCLASS    wndclass;
    HWND        hWnd;
    MSG         msg;

    app_hinst = hInst;

    /* 多重起動防止. */
    CreateMutex(NULL, 1, app_name);
    if (GetLastError() == ERROR_ALREADY_EXISTS)
        return 0;

    /* ウィンドウクラスの登録 */
    wndclass.lpszClassName  = app_name;
    wndclass.hCursor        = LoadCursor(NULL, IDI_APPLICATION);
    wndclass.hIcon          = LoadIcon(NULL,IDI_APPLICATION);
    wndclass.lpszMenuName   = MAKEINTRESOURCE(IDR_MENU);
    wndclass.hbrBackground  = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.hInstance      = hInst;
    wndclass.style          = CS_BYTEALIGNCLIENT|CS_VREDRAW|CS_HREDRAW;
    wndclass.lpfnWndProc    = (WNDPROC)winMainProc;
    wndclass.cbClsExtra     = 0;
    wndclass.cbWndExtra     = 0;
    if (RegisterClass(&wndclass) == 0)
        return 0;

    /* メインウィンドウの作成 */
    hWnd = CreateWindowEx(
          0
        , app_name
        , app_name
        , WS_OVERLAPPEDWINDOW
        , CW_USEDEFAULT
        , CW_USEDEFAULT
        , 640 + GetSystemMetrics(SM_CXSIZEFRAME)*2
        , 480 + GetSystemMetrics(SM_CYSIZEFRAME)*2+GetSystemMetrics(SM_CYMENU)+GetSystemMetrics(SM_CYCAPTION)
        , NULL
        , NULL
        , hInst
        , NULL
        );
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    /* メインループ */
    while(GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    /* 終了 */
    return 0;
}


static LRESULT CALLBACK winMainProc(HWND hWnd, UINT msg, UINT wParam, LONG lParam)
{
    /* ウィンドウ・メッセージ処理 */
    switch (msg) {
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    case WM_COMMAND:
        switch (LOWORD(wParam)) {
        case IDM_ABOUT:
            DialogBox(app_hinst, "AboutDlg", hWnd, (DLGPROC)winMainAboutDlgProc);
            return 0;
        case IDM_EXIT:
            PostMessage(hWnd, WM_CLOSE, 0, 0);
            return 0;
        default:
            break;
        }
        break;
    default:
        break;
    }
    return DefWindowProc(hWnd, msg, wParam, lParam);
}



static LRESULT CALLBACK winMainAboutDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM dummy_lParam)
{
    // Abortメッセージの表示
    switch (uMsg) {
    case WM_INITDIALOG:
        return TRUE;

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