$pid = 952;
 # 952 is a running job pid
 use threads;
 use threads::shared;
 use Win32::API;
 Win32::API->Import( 'Kernel32', q[ DWORD GetLastError( ) ] );

$retcode = Win32::API->Import( 'Kernel32',
       q[ HANDLE CreateToolhelp32Snapshot
      ( DWORD dwFlags, DWORD th32ProcessID ) ] );
print "import CreateToolhelp32Snapshot code $retcode \n";

$hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
$retcode = GetLastError();
print "CreateToolhelp32Snapshot error code $retcode \n";
print "hProcessSnap = $hProcessSnap \n";

# typedef for PROCESSENTRY32
 typedef Win32::API::Struct AA => qw{
 DWORD dwSize;
  DWORD cntUsage;
  DWORD th32ProcessID;
  ULONG_PTR th32DefaultHeapID;
  DWORD th32ModuleID;
  DWORD cntThreads;
  DWORD th32ParentProcessID;
  LONG pcPriClassBase;
  DWORD dwFlags;
  TCHAR szExeFile[MAX_PATH];
 };

$retcode = Win32::API->Import( 'Kernel32', q[BOOL Process32First(               
                 HANDLE hSnapshot,
                 LPAA lppe
               ) ] );
print "import process32first code $retcode \n";

$Point = Win32::API::Struct->new( 'AA' );
$Point->{dwSize}=Win32::API::Struct::sizeof( $Point );

Process32First($hProcessSnap, $Point);
$retcode = GetLastError();
print "process32first error $retcode \n";                

$retcode = Win32::API->Import( 'Kernel32', q[BOOL Process32Next(               
                 HANDLE hSnapshot,
                 LPAA lppe
               ) ] );
print "import process32next code $retcode \n";

until ( $Point->th32OwnerProcessID == $pid ) {
         Process32Next($hProcessSnap, $Point);
         $retcode = GetLastError();
         print "process32next error code $retcode \n";            
}