220.127.116.11.31 ApiOpenKey (Opnum 30)
The server MUST evaluate the security descriptor that is associated with the key against the user authorization context and requested access as expressed in the samDesired parameter in order to determine whether the caller can open this key.
HKEY_RPC ApiOpenKey( [in] HKEY_RPC hKey, [in, string] LPCWSTR lpSubKey, [in] DWORD samDesired, [out] error_status_t* Status );
lpSubKey: A null-terminated Unicode string that specifies the name of the subkey to be opened. The lpSubKey parameter MUST indicate a subkey that is a child of the key that is identified by hKey; does not begin with the "\" character; and is not NULL. The lpSubKey parameter can be an empty string, in which case the server MUST return an HKEY_RPC context handle that represents the cluster registry key that is represented by hKey.
samDesired: The bitmask that indicates the requested level of access to the subkey. The values in the bitmask are as specified in [MS-RRP] for REGSAM.
Status: Indicates the status of this operation. The server MUST set Status to the following error codes for the specified conditions.
The client is not permitted to open the specified subkey with the requested access.
The hKey value does not indicate a valid cluster registry key.
For any other condition, the server MUST set Status to a value that is not one of the values listed in the preceding table. The client MUST treat all values that are not listed in the preceding table the same, except as specified in section 18.104.22.168.
Return Values: If the method succeeds, the server MUST return a valid HKEY_RPC context handle; otherwise, the server MUST return NULL.