From Divinity Engine Wiki
- PROC ProcRemoveNPCADs((GUIDSTRING)_NPC)
This routine clears all dialogs that were defined for _NPC through the DB_AD_Dialog database.
- Simply undefining a DB_AD_Dialog() fact will not do anything.
- Calling this routine will not remove the ability of the player to click on the character to request starting a dialog. Disabling that can be done through SetHasDialog
- This routine will not remove any DB_Dialogs entries; call ProcRemoveAllDialogEntriesForSpeaker instead to remove those.