函数名: MK_FP 
 功  能: 设置一个远指针 
 用  法: #include <dos.h> 
         void far *MK_FP(unsigned seg, unsigned off); 
 程序例: 
#include <dos.h> 
 #include <graphics.h> 
int main(void) 
 { 
    int gd, gm, i; 
    unsigned int far *screen; 
   detectgraph(&gd, &gm); 
    if (gd == HERCMONO) 
        screen = MK_FP(0xB000, 0); 
    else 
        screen = MK_FP(0xB800, 0); 
    for (i=0; i<26; i++) 
       screen[i] = 0x0700 + ('a' + i); 
    return 0; 
 }