\C{installlog} Install Logging Instructions
\H{LogSet} LogSet
LogSet \e{on|off}
Sets whether install logging to $INSTDIR\\install.log will happen. Note that \e{NSIS_CONFIG_LOG} must be set in the installer configuration (it is not by default) to support this.
\H{LogText} LogText
LogText \e{text}
If installer logging is enabled, inserts text "text" into the log file.