函数名: getgraphmode 
 功  能: 返回当前图形模式 
 用  法: #include <graphics.h> 
         int far getgraphmode(void); 
 程序例: 
#include <graphics.h> 
 #include <stdlib.h> 
 #include <stdio.h> 
 #include <conio.h> 
int main(void) 
 { 
 /* request auto detection */ 
    int gdriver = DETECT, gmode, errorcode; 
    int midx, midy, mode; 
    char numname[80], modename[80]; 
/* initialize graphics and local variables */ 
    initgraph(&gdriver, &gmode, ""); 
/* read result of initialization */ 
    errorcode = graphresult(); 
 /* an error occurred */ 
    if (errorcode != grOk) 
    { 
       printf("Graphics error: %s\n", 
              grapherrormsg(errorcode)); 
       printf("Press any key to halt:"); 
       getch(); 
 /* terminate with an error code */ 
       exit(1); 
    } 
   midx = getmaxx() / 2; 
    midy = getmaxy() / 2; 
/* get mode number and name strings */ 
    mode = getgraphmode(); 
    sprintf(numname, 
            "%d is the current mode number.", 
            mode); 
    sprintf(modename, 
            "%s is the current graphics mode", 
            getmodename(mode)); 
/* display the information */ 
    settextjustify(CENTER_TEXT, CENTER_TEXT); 
    outtextxy(midx, midy, numname); 
    outtextxy(midx, midy+2*textheight("W"), 
              modename); 
/* clean up */ 
    getch(); 
    closegraph(); 
    return 0; 
 }