了解各个GDI函数（每天会更新）

先占位

Bitmap篇：

该类内的所有的构造函数均调用头文件GdiplusFlat.h下函数：

GpStatus WINGDIPAPI
GdipCreateBitmapFromScan0(INT width,     
                          INT height,
                          INT stride,
                          PixelFormat format,
                          BYTE* scan0,
                          GpBitmap** bitmap);

////其参数定义可查询msdn

//该函数可以返回的状态为下列枚举定义的值：

enum Status
{
    Ok = 0,
    GenericError = 1,
    InvalidParameter = 2,
    OutOfMemory = 3,
    ObjectBusy = 4,
    InsufficientBuffer = 5,
    NotImplemented = 6,
    Win32Error = 7,
    WrongState = 8,
    Aborted = 9,
    FileNotFound = 10,
    ValueOverflow = 11,
    AccessDenied = 12,
    UnknownImageFormat = 13,
    FontFamilyNotFound = 14,
    FontStyleNotFound = 15,
    NotTrueTypeFont = 16,
    UnsupportedGdiplusVersion = 17,
    GdiplusNotInitialized = 18,
    PropertyNotFound = 19,
    PropertyNotSupported = 20,
#if (GDIPVER >= 0x0110)
    ProfileNotFound = 21,
#endif //(GDIPVER >= 0x0110)
};