__uuidof，CreateDXGIFactory，D3D11CreateDeviceAndSwapChain

1、__uuidof关键字，两根下划线。

2、CreateDXGIFactory

HRESULT WINAPI CreateDXGIFactory(REFIID riid, void **ppFactory);

#define REFIID const IID &

typedef GUID IID;

typedef struct _GUID {
    unsigned long  Data1;
    unsigned short Data2;
    unsigned short Data3;
    unsigned char  Data4[ 8 ];
} GUID;

3、#define SUCCEEDED(hr) (((HRESULT)(hr)) >= 0)
#define FAILED(hr) (((HRESULT)(hr)) < 0)
#define IS_ERROR(Status) (((unsigned long)(Status)) >> 31 == SEVERITY_ERROR)

4、D3D11CreateDeviceAndSwapChain

HRESULT WINAPI D3D11CreateDeviceAndSwapChain(
    __in_opt IDXGIAdapter* pAdapter,
    D3D_DRIVER_TYPE DriverType,
    HMODULE Software,
    UINT Flags,
    __in_ecount_opt( FeatureLevels ) CONST D3D_FEATURE_LEVEL* pFeatureLevels,
    UINT FeatureLevels,
    UINT SDKVersion,
    __in_opt CONST DXGI_SWAP_CHAIN_DESC* pSwapChainDesc,
    __out_opt IDXGISwapChain** ppSwapChain,
    __out_opt ID3D11Device** ppDevice,
    __out_opt D3D_FEATURE_LEVEL* pFeatureLevel,
    __out_opt ID3D11DeviceContext** ppImmediateContext );

typedef 
enum D3D_DRIVER_TYPE
    { D3D_DRIVER_TYPE_UNKNOWN = 0,
D3D_DRIVER_TYPE_HARDWARE = ( D3D_DRIVER_TYPE_UNKNOWN + 1 ) ,
D3D_DRIVER_TYPE_REFERENCE = ( D3D_DRIVER_TYPE_HARDWARE + 1 ) ,
D3D_DRIVER_TYPE_NULL = ( D3D_DRIVER_TYPE_REFERENCE + 1 ) ,
D3D_DRIVER_TYPE_SOFTWARE = ( D3D_DRIVER_TYPE_NULL + 1 ) ,
D3D_DRIVER_TYPE_WARP = ( D3D_DRIVER_TYPE_SOFTWARE + 1 ) 
    } D3D_DRIVER_TYPE;

typedef 
enum D3D_FEATURE_LEVEL
    { D3D_FEATURE_LEVEL_9_1 = 0x9100,
D3D_FEATURE_LEVEL_9_2 = 0x9200,
D3D_FEATURE_LEVEL_9_3 = 0x9300,
D3D_FEATURE_LEVEL_10_0 = 0xa000,
D3D_FEATURE_LEVEL_10_1 = 0xa100,
D3D_FEATURE_LEVEL_11_0 = 0xb000
    } D3D_FEATURE_LEVEL;