问DirectX 9-获取相机分辨率？(C++)

EN

HWND                    m_hwnd;
HDC                     *phdc;
IDirect3D9              *m_pD3D;
IDirect3DDevice9        *m_pDevice;
IDirect3DSwapChain9     *m_pSwapChain;

HRESULT DrawDevice::CreateDevice(HWND hwnd)
{
    if (m_pDevice)
    {
        return S_OK;
    }

    // Create the Direct3D object.
    if (m_pD3D == NULL)
    {
        m_pD3D = Direct3DCreate9(D3D_SDK_VERSION);

        if (m_pD3D == NULL)
        {
            return E_FAIL;
        }
    }


    HRESULT hr = S_OK;
    D3DPRESENT_PARAMETERS pp = { 0 };
    D3DDISPLAYMODE mode = { 0 };

    hr = m_pD3D->GetAdapterDisplayMode(
        D3DADAPTER_DEFAULT,
        &mode
    );

    if (FAILED(hr)) { return hr; }

    hr = m_pD3D->CheckDeviceType(
        D3DADAPTER_DEFAULT,
        D3DDEVTYPE_HAL,
        mode.Format,
        D3DFMT_X8R8G8B8,
        TRUE    // windowed
    );

    if (FAILED(hr)) { return hr; }

    pp.BackBufferFormat = D3DFMT_X8R8G8B8;
    pp.SwapEffect = D3DSWAPEFFECT_COPY;
    pp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
    pp.Windowed = TRUE;
    pp.hDeviceWindow = hwnd;

    hr = m_pD3D->CreateDevice(
        D3DADAPTER_DEFAULT,
        D3DDEVTYPE_HAL,
        hwnd,
        D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_FPU_PRESERVE,
        &pp,
        &m_pDevice
    );

    if (FAILED(hr)) { return hr; }

    m_hwnd = hwnd;
    m_d3dpp = pp;


    return hr;
}