The acetutil modules (acetutil.arx and acetutil*.fas) provide a number of utility functions which can be called from AutoLISP on Windows for AutoCAD only.
This documentation covers all the functionality present in version 1.38 of acetutil.arx, along with a few functions provided in acetutil.fas. Functions that do not have a specific library designation appear in acetutil.arx.
Starting with AutoCAD 2025, you might need to initialize the Express Tools Utility functions before they can be used by your AutoLISP programs. The acet-load-expresstools function is used to initialize the Express Tools Utility functions, which is similar to initializing the ActiveX/COM library for use with the vl-load-com function.
Note: The
acet-util-ver function can be called to identify the module version of the Express Tools Utility functions. This function returns a REAL value containing the current version number of the
acetutil.arx library.
(acet-util-ver) 1.38