How to use 'TH_WP_DETAIL_INFO'

Hi all,

How do we use this FM 'TH_WP_DETAIL_INFO' to get the PID of the current program?

when I execute like this

CALL FUNCTION 'TH_WP_DETAIL_INFO'
EXPORTING
    WP                           = 'XX'
    WITH_CPU                = '10'
    WP_INDEX                = '0'
  IMPORTING
    WPINFO                       = wpinfo.

I am always getting the first PID in stack.

Please help me

Thanks in advance.

Santhosini