How to get PID file in MYSQL -

how location of mysql pid file using api in windows ?

i trying mysql pid file.

i have written code

select @@global.pid_file 

it working in linux. not working in windows. how fix ?

show variables 'pid_file'

if doesn't work guess doesn't exist on windows systems.

edit:

actually, after checked turns out variable used on unix-like systems, doesn't exist on windows.