C / C++ / MFC

/**************************************************************
* p2cComm.c
*   
* C program that implements communication between two processes  
* Program creates 2 unnamed pipes, p and q. Then it creates a 
* child process. Next, it links the parent with the child using
* the two pipes. Pipe p: Parent to Child, Pipe q: Child to Parent.
* Child receives commands from parent through Pipe p and sends 
* responses through Pipe q.
***************************************************************/  

#include <stdio.h> 
#include <stdlib.h> 
#include <unistd.h> 
 
int main(int argc, char *argv[]){ 
 
        int pid; 
        int p[2];   /* pipe "p" */ 
        int q[2];   /* pipe "q" */ 
        int a; 
        int b; 
 
        /* Create Pipe. Pipe P is used to transfer information  
        from the parent process to the child process */ 
        a = pipe(p);
        if(a == -1) 
        { 
        fprintf(stderr, "Pipe Failed.\n"); 
        return EXIT_FAILURE; 
        } 
         
        /* Create second pipe. Pipe Q is used to transfer information 
        from the child process to the parent process. */ 
        b = pipe(q); 
        if(b == -1) 
        { 
         fprintf(stderr, "Pipe Failed.\n"); 
         return EXIT_FAILURE; 
        } 
         
        /* Create child process */ 
        pid = fork(); 
 
        switch(pid){ 
         
                case -1: /* fork failed */ 
                        perror("main: fork"); 
                        exit(1); 
                
		/* Child process will execute a loop, waiting for command
		from the parent process. Child executes the command. Child
		returns a response to the parent */
		case 0: /* Child process */ 
                printf("Child process ID: %d\n", pid);
                break;
                /* do some things */ 
 
                /* Parent process will execute a loop, asking user for a one
		line command. Parent sends command to child for execution.
		Parent waits for the response of the child. Parent finally
		reports the result (displayed on screen). */
		default: /* Parent process */ 
                printf("Parent process ID: %d\n", pid);
                break;
                /* do some things */ 
         } 
        getchar();
        return 0; 
}

BytesReceived = recv(IPv4, Data, sizeof(Data), 0);