时钟源程序加效果图。。。另外请教大神一个问题，内详

问题就是我想这个生成的钟表exe图标换成我想要的ICO图标，不知道这么更改？这为效果图，还很粗糙望大家笔下留情，呵呵！源程序如下：
#include<graphics.h>
#include<conio.h>
#include<math.h>
#include<stdio.h>
#define PI 3.1415
void Draw(int hour,int minute,int second)
{
int x_hour,y_hour,x_minute,y_minute,x_second,y_second;
double a_hour,a_minute,a_second;
a_second=second*2*PI/60;
a_minute=minute*2*PI/60+a_second/60;
a_hour=hour*2*PI/12+a_minute/12;
x_second=320+(int)(120*sin(a_second));
y_second=240-(int)(120*cos(a_second));
x_minute=320+(int)(100*sin(a_minute));
y_minute=240-(int)(100*cos(a_minute));
x_hour=320+(int)(70*sin(a_hour));
y_hour=240-(int)(70*cos(a_hour));
setlinestyle(PS_SOLID,NULL,6);
setcolor(WHITE);
line(320,240,x_hour,y_hour);
setlinestyle(PS_SOLID,NULL,4);
setcolor(LIGHTGRAY);
line(320,240,x_minute,y_minute);
setlinestyle(PS_SOLID,NULL,2);
setcolor(RED);
line(320,240,x_second,y_second);
}
void ShowTime(int hour,int minute,int second)
{
char chHour[4],chMinute[4],chSecond[4];
sprintf(chHour,"%d",hour);
sprintf(chMinute,"%d",minute);
sprintf(chSecond,"%d",second);
setcolor(YELLOW);
outtextxy(258,430,chHour);
outtextxy(288,430,":");
outtextxy(308,430,chMinute);
outtextxy(338,430,":");
if(second < 10)
{
outtextxy(353,430,"0");
outtextxy(366,430,chSecond);
}
else
{
outtextxy(358,430,chSecond);
}
}
void main()
{
int x_kedu,y_kedu;
initgraph(640,480);
setfont(24,0,"宋体");
outtextxy(308,90,"12");
outtextxy(460,228,"3");
outtextxy(312,365,"6");
outtextxy(170,228,"9");
//setlinestyle(PS_USERSTYLE,0xAAff,1);
setlinestyle(PS_SOLID,NULL,3);
setwritemode(R2_XORPEN);
setcolor(LIGHTGRAY);
circle(320,240,160);
setcolor(YELLOW);
setfont(24,0,"宋体");
outtextxy(300,40,"Time");
setcolor(WHITE);
for(int i=0;i<=60;i++)
{
x_kedu=320+(int)(160*sin(i*2*PI/60));
y_kedu=240-(int)(160*cos(i*2*PI/60));
moveto(x_kedu,y_kedu);
if(i%5==0)
{
setlinestyle(PS_SOLID,NULL,5);
linerel((int)(-5*sin(i*2*PI/60)),(int)(5*cos(i*2*PI/60)));
}
else
{
setlinestyle(PS_SOLID,NULL,2);
linerel((int)(-5*sin(i*2*PI/60)),(int)(5*cos(i*2*PI/60)));
}
}
SYSTEMTIME ti;
while(!kbhit())
{
GetLocalTime(&ti);
ShowTime(ti.wHour,ti.wMinute,ti.wSecond);
Draw(ti.wHour,ti.wMinute,ti.wSecond);
Sleep(1000);
Draw(ti.wHour,ti.wMinute,ti.wSecond);
setcolor(BLACK);
outtextxy(258,430," ");
}
closegraph();
}