/*
    ちょっとお試し Windows program sample 1
 */

#include <windows.h>


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;
    }
    return DefWindowProc(hWnd, msg, wParam, lParam);
}


int WINAPI WinMain(HINSTANCE hInst, HINSTANCE dummy_hPrevInst, LPSTR dummy_lpCmdLine, int nCmdShow)
{
    /* ここより始まる */
    char        *app_name = "hello world.";     /*プログラムの名前*/
    WNDCLASS    wndclass;
    HWND        hWnd;
    MSG         msg;

    /* 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   = NULL;
    wndclass.hbrBackground  = (HBRUSH)GetStockObject(BLACK_BRUSH);
    wndclass.hInstance      = hInst;
    wndclass.style          = 0;
    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
        , 320 + GetSystemMetrics(SM_CXSIZEFRAME)*2
        , 240 + 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;
}