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Gets the process identification.


This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported in Universal Windows Platform apps.


int _getpid( void );

Return value

Returns the process ID obtained from the system. There's no error return.


The _getpid function obtains the process ID from the system. The process ID uniquely identifies the calling process.


Routine Required header
_getpid <process.h>

For more compatibility information, see Compatibility.


// crt_getpid.c
// This program uses _getpid to obtain
// the process ID and then prints the ID.

#include <stdio.h>
#include <process.h>

int main( void )
   // If run from command line, shows different ID for
   // command line than for operating system shell.

   printf( "Process id: %d\n", _getpid() );
Process id: 3584

See also

Process and environment control
_mktemp, _wmktemp