Create custom entries in the event log. Event IDs can be any number between 1 and 1000. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/eventcreate.
eventcreate /t success|error|warning|information /id id /d "message"
eventcreate /l log_name /t type /id id /d "message"
eventcreate /so source_name /t type /id id /d "message"
eventcreate /s hostname /u username /p password /t type /id id /d "message"