Question : How to access Macbook's folders in PC's local Network

I have a macbook pro and 2 PCS.  
I can see all computers on my local network.
But I can't access Mac's "Public Folder" from PC. when I double click the public folder, it says:
"....contact the admin of this server to find out if you have access permissions".
Current Sharing Option is SMB.

note: macbook pro does have a password that i need to enter before login to each user account.

Answer : How to access Macbook's folders in PC's local Network

Click the + button and select Add New Person. Add the username and password for the PC user.