exe a dial up connection

hi all
i have just finished this small program to log who made a connection along with the time and date.

Code:

#include <time.h>
#include <windows.h>
#include <stdio.h>
void main(int)
{
  char datebuf[9];    //time and date
  char timebuf[9];
  char temp[2];        //buffer to swap dd/mm
  
  TCHAR buff[256];    //user name
  DWORD size = 256;

  char filename[15];
  strcpy(filename,"H:/Dialup.log");    //this is the location to save to                                    
  FILE *fptr;                        //file pointer


  _strdate(datebuf);        //get time and date
  _strtime(timebuf);
  GetUserName(buff,&size);    //get logged on user


temp[0] = datebuf[0];   //to sort from mm/dd/yy to dd/mm/yy
temp[1] = datebuf[1];
datebuf[0] = datebuf[3];
datebuf[1] = datebuf[4];
datebuf[3] = temp[0];
datebuf[4] = temp[1];



if((fptr=fopen(filename,"a"))==NULL)    /*amend*/
            {
                printf("Error: File %s could not be created.\n\a",filename);
                printf("Check the disk is not full or protected.\n");
                    /*buzzer if error*/
            }


  fprintf(fptr,"User: %s\t\tDate: %s\tTime: %s\n",buff,datebuf,timebuf);
  fclose(fptr);
}

however i dont know how to make C exe a dial up connection.
also a dial up has a strange location eg. {262480y48rwhdqw8eryq23}

or an easier way whould be to attch the c program to the dial up so that if the dial up is clicked on it will also run the above C program, but i dont know how to do that either.

hope you can help
thx

to clear up that last bit

how can i get clicking on a network connection to run a c program