Program of moving message box like windows

#include <conio.h>
#include\"win_mous.cpp\"// Must include for Win & mouse functions
#define DRAW 2
#define PUSH 1
#define UNPUSH 0
//--------------------------------------------------------------------------
int mx,my,button;
void wmouse();
int check_pos(int cx,int cy,int cx1,int cy1);
void DrawMbox(int xx,int yy,char *e);
int Ebox(char *e);
//--------------------------------------------------------------------------
void main()
{
 int ox,oy;
 G();
 setfillstyle(1,3);
 bar(0,0,640,480);
 showmouse();
 Ebox(\"Move me around !\");
 getch();
 closegraph();
}
//--------------------------------------------------------------------------
void wmouse() // stops continue looping
{
 int ox,oy;
 ox=mx;oy=my;
 while(ox==mx && oy==my && button==1)
 getmouse(&button,&mx,&my);
}
//--------------------------------------------------------------------------
int check_pos(int cx,int cy,int cx1,int cy1)
{
 int flag;
 flag=0;
 if(mx>=cx && mx<=cx1 && my>=cy && my<=cy1) flag=1;
 return flag;
}
//--------------------------------------------------------------------------
void DrawMbox(int xx,int yy,char *e)
{
 int t;
 Win(\"Message Box\",xx+1,yy+1,xx+272,yy+119,1);
// setcolor(0);
// rectangle(xx,yy,xx+273,yy+120);
 setfillstyle(1,0);
 fillellipse(xx+36,yy+58,15,15);
 setfillstyle(1,12);
 fillellipse(xx+33,yy+55,15,15);
 setcolor(15);
 for(t=0;t<=3;t++)
 {
 line(xx+26,yy+47+t,xx+42,yy+59+t);
 line(xx+42,yy+47+t,xx+26,yy+59+t);
 }
 Button(\"Ok\",xx+110,yy+90,xx+160,yy+110,DRAW);
 setcolor(0);
 settextstyle(0,0,0);
 outtextxy(xx+68,yy+55,e);
}
//--------------------------------------------------------------------------
int Ebox(char *e)
{
 int tx,ty,a,b;
// text=\"Message Box or Error Box\";
 hidemouse();
 tx=177;ty=70;
 DrawMbox(tx,ty,e);
 showmouse();
 while(1)
 {
  if(kbhit()) break;
  showmouse();
  getmouse(&button,&mx,&my);
  if((button & 1)==1)
  {
   if(check_pos(tx+110,ty+90,tx+160,ty+110))//ok
   {
     Button(\"\",tx+110,ty+90,tx+160,ty+110,PUSH);
     while((button & 1)==1)
     getmouse(&button,&mx,&my);
     Button(\"\",tx+110,ty+90,tx+160,ty+110,UNPUSH);
     hidemouse();
     setfillstyle(1,3);// clear win
     bar(0,0,640,480);
     setcolor(1);
     outtextxy(260,200,\"Press any key\");
     showmouse();
     return(1);
   }
   if(check_pos(tx+4,ty,tx+252,ty+20))// click on top blue strip
   {
    a=mx-tx;
    b=my-ty;
    setcolor(15);
    setlinestyle(1,1,1);
    setwritemode(XOR_PUT);
    getmouse(&button,&mx,&my);
    while((button & 1)==1)
    {
    getmouse(&button,&mx,&my);
    tx=mx-a;
    ty=my-b;
    hidemouse();
    rectangle(tx+1,ty+1,tx+272,ty+119);
    showmouse();
    wmouse();
    hidemouse();
    rectangle(tx+1,ty+1,tx+272,ty+119);
    showmouse();
    }
    setlinestyle(0,0,0);
    setwritemode(COPY_PUT);
    hidemouse();
    setfillstyle(1,3);
    bar(0,0,640,480);
    DrawMbox(tx,ty,e);
    showmouse();
   }
  }
  while((button & 1)==1)
  getmouse(&button,&mx,&my);
 }
 showmouse();
 return 1;
}