Program that displays checkbox like windows

#include<graphics.h>
#include<conio.h>
#include<stdlib.h>
#include<stdio.h>
#include\"Win_Mous.cpp\" // Needed for mouse & window functions, included in zip
void main()
{
 int x,y,b,e=1,ok=0;
 G();
 setfillstyle(1,3);
 bar(0,0,639,479);
 Win(\"Check-Box\",100,50,450,400,1);
 checkcircle(200,100);
 checkcircle(200,150);
 checkcircle(200,200);
 checkbox(150,100);
 checkbox(150,150);
 checkbox(150,200);
 setcolor(0);
 outtextxy(240,100,\"Option 1\");
 outtextxy(240,150,\"Option 2\");
 outtextxy(240,200,\"Option 3\");
// outtextxy(150,250,\"left button : check & uncheck\");
 checkc(200,100,1);
 Button(\"Ok\",240,330,290,350,DRAW);
 showmouse();
 do
 {
     if(kbhit()) {if(getch()==27) e=0;}
     getmouse(&b,&x,&y);
     if((b&1)==1)
     {
         if(x>=240 && x<=290 && y>=330 && y<=350)// ok
         {
            e=0;
         }
         if(x>=150 && x<=160 && y>=100 && y<=110)
         {
             if(ok==0) ok=1;
             else if(ok==1) ok=0;
             hidemouse();
             setfillstyle(1,7);
             bar(150,100,160,110);
             showmouse();
             while((b&1)==1)
             getmouse(&b,&x,&y);
             hidemouse();
             setfillstyle(1,15);
             bar(150,100,160,110);
             check(150,100,ok);
             showmouse();
         }
         if(x>=150 && x<=160 && y>=150 && y<=160)
         {
             if(ok==0) ok=1;
             else if(ok==1) ok=0;
             hidemouse();
             check(150,150,ok);
             showmouse();
         }
         if(x>=150 && x<=160 && y>=200 && y<=210)
         {
             if(ok==0) ok=1;
             else if(ok==1) ok=0;
             hidemouse();
             check(150,200,ok);
             showmouse();
         }
         if(x>=200 && x<=210 && y>=100 && y<=110)
         {
             hidemouse();
             checkc(200,100,1);
             checkc(200,150,0);
             checkc(200,200,0);
             showmouse();
         }
         if(x>=200 && x<=210 && y>=150 && y<=160)
         {
             hidemouse();
             checkc(200,100,0);
             checkc(200,150,1);
             checkc(200,200,0);
             showmouse();
         }
         if(x>=200 && x<=210 && y>=200 && y<=210)
         {
             hidemouse();
             checkc(200,100,0);
             checkc(200,150,0);
             checkc(200,200,1);
             showmouse();
         }
         while((b&1)==1)
         getmouse(&b,&x,&y);
     }
 }while(e);
 hidemouse();
 closegraph();
}