DirectX window media keys not responding

Im making a game with a custom game engine and when you have selected the window that it creates it doesn't allow you to use media keys e.g. changing volume or playing/pausing music or anything that has to do with windows like getting the windows start menu and alt+tab behaves weird

It feels like my window is "blocking" all system specific keys and commands

The code is written in c++

Heres the code i'm using for creating the window:

bool FrameWork::CreateDXWnd(int x, int y, int width, int height)
{
    HWND hwnd;
    WNDCLASSEX wc;

    m_hInstance = GetModuleHandle(nullptr);

    //setup window class with default setings:
    wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = m_hInstance;
    //wc.hIcon = LoadIcon(nullptr, IDI_WINLOGO);
    wc.hIcon = (HICON)LoadImage(m_hInstance, ".\\Assets\\Icons\\NgineIcon512.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE);
    wc.hIconSm = wc.hIcon;
    wc.hCursor = LoadCursor(nullptr, IDC_HAND);
    wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
    wc.lpszMenuName = nullptr;
    wc.lpszClassName = applicationName.c_str();
    wc.cbSize = sizeof(WNDCLASSEX);

    if (!RegisterClassEx(&wc))
    {
        Error(1);
        return false;
    }

    //Style of window
    //int nStyle = WS_OVERLAPPED | WS_SYSMENU | WS_VISIBLE | WS_CAPTION | WS_MINIMIZEBOX;
    int nStyle = WS_OVERLAPPED | WS_SYSMENU | WS_VISIBLE | WS_CAPTION | WS_MINIMIZEBOX;

    SettingsManager::GetInstance()->SetNativeResolution(GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN));

    if (SettingsManager::GetInstance()->GetDisplayMode() == FULLSCREEN)
    {
        DEVMODE dmScreenSettings;
        memset(&dmScreenSettings, 0, sizeof(dmScreenSettings));
        dmScreenSettings.dmSize = sizeof(dmScreenSettings);
        dmScreenSettings.dmPelsWidth = (unsigned long)SettingsManager::GetInstance()->GetScreenWidth();
        dmScreenSettings.dmPelsHeight = (unsigned long)SettingsManager::GetInstance()->GetScreenHeight();
        dmScreenSettings.dmBitsPerPel = 32;
        dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;

        ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN);
    }
    else
    {

    }
    if ((SettingsManager::GetInstance()->GetDisplayMode() == BORDERLESS))
    {
        hwnd = CreateWindowEx(WS_EX_APPWINDOW, applicationName.c_str(), applicationName.c_str(), WS_POPUP, x, y, SettingsManager::GetInstance()->GetScreenWidth(), SettingsManager::GetInstance()->GetScreenHeight(), nullptr, nullptr, m_hInstance, nullptr);
    }
    else
    {
        hwnd = CreateWindowEx(WS_EX_APPWINDOW, applicationName.c_str(), applicationName.c_str(), nStyle, x, y, SettingsManager::GetInstance()->GetScreenWidth(), SettingsManager::GetInstance()->GetScreenHeight(), nullptr, nullptr, m_hInstance, nullptr);

    }


    if (hwnd == nullptr)
    {
        Error(2);
        Ngine::GetInstance()->Release();
        PostQuitMessage(0);
        return false;
    }

    if (!Ngine::GetInstance()->InitGraphics(hwnd))
    {
        Error(hwnd, 30);
        Ngine::GetInstance()->Release();
        PostQuitMessage(0);
        UnregisterClass(applicationName.c_str(), m_hInstance);
        m_hInstance = nullptr;
        DestroyWindow(hwnd);

        return false;
    }

    Ngine::GetInstance()->GetGraphics()->SetHwnd(hwnd);

    ShowWindow(hwnd, SW_SHOW);
    SetForegroundWindow(hwnd);
    SetFocus(hwnd);

    return true;
}

Tim. The code you are showing deals with creating a window, not with how to handle the input to the window. To handle input, you need to set up a Message handling loop in your code.

Typically, in a game engine, you will have a main loop or "Game Loop", with each pass through the loop typically resulting in a single frame drawn. The first thing the Game Loop does is handle window messages. This allows you to handle the typical windows functions. Then, once you have no more messages to deal with, you will move on to handling your game's logic and rendering.

I recommend you take a look at Braynzarsoft's tutorials. The tutorial I linked deals with setting up your window and how to make a bare-bones Windows Message system.

Once you understand the basics of that, you can refine your post if needed to get more information.