有谁知道怎样安装C语言中的graphics.h以及哪里可下载吗？

/* graphics.h

Definitions for Graphics Package.

Copyright (c) Borland International 1987,1988
All Rights Reserved.
*/

#if __STDC__
#define _Cdecl
#else
#define _Cdecl cdecl
#endif

#if !defined(__GRAPHX_DEF_)
#define __GRAPHX_DEF_

enum graphics_errors { /* graphresult error return codes */
grOk = 0,
grNoInitGraph = -1,
grNotDetected = -2,
grFileNotFound = -3,
grInvalidDriver = -4,
grNoLoadMem = -5,
grNoScanMem = -6,
grNoFloodMem = -7,
grFontNotFound = -8,
grNoFontMem = -9,
grInvalidMode = -10,
grError = -11, /* generic error */
grIOerror = -12,
grInvalidFont = -13,
grInvalidFontNum = -14,
grInvalidVersion = -18
};

enum graphics_drivers { /* define graphics drivers */
DETECT, /* requests autodetection */