help required in Code understanding

Hi,

I am having the following code in a program.Please help me understand this. On F5 the 'fields' table get populated.

Where and how does it fetch data ?

system-call ict

did

ihttp_scid_get_header_fields

parameters

m_c_msg " > c handle

fields " > header fields table

m_last_error. " < return code

Thanks,

Amit