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Gets the process identification.

int _getpid( void );

Return Value

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


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


Routine Required header Compatibility
_getpid <process.h> Win 98, Win Me, Win NT, Win 2000, Win XP

For additional compatibility information, see Compatibility in the Introduction.


All versions of the C run-time libraries.


// 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() );

Sample Output

Process id: 3584

See Also

Process and Environment Control Routines | _mktemp | Run-Time Routines and .NET Framework Equivalents