Parallel programming problem

[Mena samy]

Hello every body
I made a small prog. to click mouse , but when i tried to make it parallel using mpi it doesn't work

can any body lead me where is the error

#include "mpi.h"
#include <windows.h>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
int myid, numprocs;

int n1=0;
   MPI_Init(&argc,&argv);
   
   MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
   MPI_Comm_rank(MPI_COMM_WORLD,&myid);
 

if(myid<5)
{
	
	while (n1 <5000)
   {
         mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);
       n1++;
    }
 
}

MPI_Finalize();
  return 0;
}

thanks