Internet Direct (Indy) Version 9.0.2 Beta
TIdProxyConnectionInfo.BasicAuthentication
Indicates that HTTP Basic Access authentication should be used.

property BasicAuthentication: boolean;
Description
BasicAuthentication is a Boolean property that indicates if the HTTP Basic Access authentication algorithm should be used to calculate authorization credentials for the HTTP proxy connection. Set BasicAuthentication to True to allow TIdBasicAuthentication to be assigned to Authentication in SetHeaders.