Function getdrivername returns a pointer to the current graphics driver.
C program for getdrivername
#include <graphics.h>
#include <conio.h>
#include <conio.h>
int main()
{
int gd = DETECT, gm;
char *name;
initgraph(&gd, &gm, "C:\\TC\\BGI");
name = getdrivername();
outtextxy(200, 200, name);
getch();
closegraph();
return 0;
}