Thank you Tore.
In the link you pointed, the only one available help realtive to subject becomes from
https://www.berezniker.com/content/pages/visual-foxpro/read-pop3-mail-using-winsock

its the same as this link pointed by Anderson (Converted to VFP by William Steinford).
http://fox.wikis.com/wc.dll?Wiki~GetPopEmail
i try it above with (pop.gmail.server+username+password) and returns error despite setting pop enabed in my gmail .
Return same error (protocol) as shown in the photo attached above.