DirectX初始化接口失败

pD3D=Direct3DCreate9(D3D_SDK_VERSION);
    if(pD3D!=NULL)
    {
        D3DPRESENT_PARAMETERS d3dpp;
        memset(&d3dpp,0,sizeof(d3dpp));
        d3dpp.BackBufferWidth=SURFACE_WIDTH;
        d3dpp.BackBufferHeight=SURFACE_HEIGHT;
        d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;
        d3dpp.BackBufferFormat=D3DFMT_A8R8G8B8;
        d3dpp.BackBufferCount=1;
        d3dpp.Windowed=false;
        d3dpp.hDeviceWindow=g_hWnd;
        d3dpp.MultiSampleType=D3DMULTISAMPLE_NONE;
        d3dpp.MultiSampleQuality=0;
        d3dpp.EnableAutoDepthStencil=FALSE;
        d3dpp.AutoDepthStencilFormat=D3DFMT_D24FS8;
        d3dpp.Flags=0;
        d3dpp.FullScreen_RefreshRateInHz=D3DPRESENT_RATE_DEFAULT;
        d3dpp.PresentationInterval=D3DPRESENT_INTERVAL_DEFAULT;
        HRESULT hr=pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,g_hWnd,D3DCREATE_HARDWARE_VERTEXPROCESSING,&d3dpp,&pd3dDevice);
        if(!FAILED(hr))
        {
            return true;
        }
        else
        {
            switch(hr)
            {
            case D3DERR_INVALIDCALL:
                OutputDebugString(L"函数的参数为一个无效值\n");
                break;
            case D3DERR_NOTAVAILABLE:
                OutputDebugString(L"当前设备不支持所设类型\n");
                break;
            case D3DERR_OUTOFVIDEOMEMORY:
                OutputDebugString(L"没有足够的显存执行操作\n");
                break;
            default:
                OutputDebugString(L"未知错误\n");
                break;
            }
        }
    }
    return false;