学习DX11 二

int CALLBACK WinMain(
    _In_ HINSTANCE hInstance, 
    _In_opt_ HINSTANCE hPrevInstance, 
    _In_ LPSTR lpCmdLine, 
    _In_ int nShowCmd)
{
    const auto pClassName = L"renyibutts";
    //注册一个窗口类
    WNDCLASSEX wc = {0};
    wc.cbSize = sizeof(wc);
    wc.style = CS_OWNDC;
    wc.lpfnWndProc = DefWindowProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = nullptr;
    wc.hCursor = nullptr;
    wc.hbrBackground = nullptr;
    wc.lpszMenuName = nullptr;
    wc.lpszClassName = pClassName;
    wc.hIconSm = nullptr;
    RegisterClassEx(&wc);
    //创造实例
    HWND hWnd = CreateWindowEx(
        0,
        pClassName,
        L"Happy Hard Window",
        WS_CAPTION | WS_MAXIMIZEBOX | WS_SYSMENU,
        200, 200, 640, 480,
        nullptr, nullptr, hInstance, nullptr
    );
　　//显示窗口
    ShowWindow(hWnd, SW_SHOW);
    while (true);
    return 0;
}