reghiveunload
From WinBuilder
RegHiveUnload
Unload an external registry hive from your local registry system that was previously loaded with the RegHiveLoad command or with another application capable of handling external hives.
Syntax
RegHiveUnload,<SectionName>
Remarks
This command is based on Windows 32bit API and works under any Windows platform - under Vista/Windows 7 it is necessary to disable the UAC (User Account Control) or run as Administrator.
Example:
RegHiveUnload,Build