This property is used to tell the class which type of authorization to perform when connecting to the proxy.
int SetProxyAuthScheme(int iProxyAuthScheme);
ProxyAuthScheme should be set to authNone (3) when no authentication is expected.
If ProxyAuthScheme is set to authDigest (1), digest authentication will be attempted instead.
If ProxyAuthScheme is set to authProprietary (2), then the authorization token will not be generated by the class. Look at the configuration file for the class being used to find more information about manually setting this token.
If ProxyAuthScheme is set to authNtlm (4), NTLM authentication will be used.