UltraLite User's Guide
  UltraLite Reference
    Macros and compiler directives for UltraLite C/C++ applications

UL_ENABLE_USER_AUTH macro

Function 

For C++ API applications only, define this directive to enable user authentication. Without this directive, there is no user authentication on C++ API UltraLite applications.

Applies to 

The ulapi.cpp file.

See also 

Adding user authentication to your application