@REGSET[HKEY...\subkey\value,type,data]: Write a value to the registry. REGSET supports keys of type REG_DWORD, REG_SZ, REG_EXPAND_SZ, REG_MULTI_SZ, and REG_DWORD_LITTLE_ENDIAN. Type is the value type (REG_DWORD, REG_EXPAND_SZ, or REG_SZ). Data is the data to set. If this parameter is not supplied, @REGSET will remove the value. REGSET returns 0 if the value was written or the Windows error number if an error occurred.
If you're setting REG_MULTI_SZ values, separate each data argument with a comma.
If the key name begins with \\machinename, @REGSET opens the registry on a remote machine. The remote registry service must be running on the remote machine, and you must have access and permissions. The HKEY parameter can be one of the following keys:
HKEY_CLASSES_ROOT (or HKCR)
HKEY_CURRENT_CONFIG (or HKCC)
HKEY_CURRENT_USER (or HKCU)
HKEY_LOCAL_MACHINE (or HKLM)
HKEY_PERFORMANCE_DATA (or HKPD)
HKEY_USERS (or HKU)
Note: Remember to use quotes around any entry containing spaces or commas!