VuGen Function Reference

Welcome to the Virtual User Generator (VuGen) 2023 Function Reference.

The Function Reference provides descriptions and examples for functions that are used with supported protocols in VuGen test scripts. They can also be used in test scripts that are used with various other Micro Focus products, for example, LoadRunner Cloud.


  • For information on DevWeb functions, see DevWeb JavaScript SDK in the LoadRunner Developer and DevWeb Help Center.

  • For information on TruClient functions, see TruClient functions in the TruClient Help Center.


This index includes all protocol functions. For utility functions and general use functions, like XML, VTS, C Language, and so on, see Utility Functions and C Language Reference.

Earlier versions

Use the Function Reference version that is compatible with the product version that you are using. The following links provide access to previous versions of the Function Reference documentation.