Header File 

process.h  

Category 

Process Control Routines 

Prototype 

unsigned getpid(void) 

Description 

Gets the process ID of a program. 

This function returns the current process ID--an integer that uniquely identifies the process. 

Return Value 

getpid returns the current process' ID. 

Example  

#include <stdio.h>
#include <process.h>
int main()
{
   printf("This program's process identification number (PID) "
          "number is %X\n", getpid());
   printf("Note: under DOS it is the PSP segment\n");
   return 0;
}

Portability