[stunnel-users] How to configure stunnel as HTTP proxy on Windows?

Hello, I want to use stunnel on Windows as HTTP proxy, I changed the configuration as below:

; Encrypted HTTP proxy authenticated with a client certificate ; located in the Windows certificate store [example-proxy] client = yes accept = 127.0.0.1:8080 connect = google.com:8443 ;engineId = capi

; Encrypted HTTP proxy authenticated with a client certificate ; located in a cryptographic token [example-pkcs11] client = yes accept = 127.0.0.1:8080 connect = google.com:8443 ;engineId = pkcs11 cert = pkcs11:token=MyToken;object=MyCert key = pkcs11:token=MyToken;object=MyKey

But, it show me configuration error. How can I solve it?

Thank you.