3.1.4.16 ROpenServiceW (Opnum 16)

The ROpenServiceW method creates an RPC context handle to an existing service record.

 DWORD ROpenServiceW(
   [in] SC_RPC_HANDLE hSCManager,
   [in, string, range(0, SC_MAX_NAME_LENGTH)] 
     wchar_t* lpServiceName,
   [in] DWORD dwDesiredAccess,
   [out] LPSC_RPC_HANDLE lpServiceHandle
 );

hSCManager: An SC_RPC_HANDLE (section 2.2.4) data type that defines the handle to the SCM database, created using one of the open methods specified in section 3.1.4.

lpServiceName: A pointer to a null-terminated UNICODE string that specifies the ServiceName of the service record.

The forward slash, back slash, comma, and space characters are illegal in service names.

dwDesiredAccess: A value that specifies the access right. This MUST be one of the values as specified in section 3.1.4.

lpServiceHandle: An LPSC_RPC_HANDLE (section 2.2.4) data type that defines the handle to the found service record.

Return Values: The method returns 0x00000000 (ERROR_SUCCESS) on success; otherwise, it returns one of the following error codes.

Return value/code	Description
5 ERROR_ACCESS_DENIED	The access specified by the dwDesiredAccess parameter cannot be granted to the caller.
6 ERROR_INVALID_HANDLE	The handle is no longer valid.
123 ERROR_INVALID_NAME	The specified service name is invalid.
1060 ERROR_SERVICE_DOES_NOT_EXIST	The service record with a specified DisplayName does not exist in the SCM database.
1115 ERROR_SHUTDOWN_IN_PROGRESS	The system is shutting down.

In response to this request from the client, for a successful operation the server MUST create an RPC context handle to the service record identified by the lpServiceName parameter in the SCM database identified by the hSCManager parameter of the client request after evaluating the SecurityDescriptor found in the service record against the caller's security context for the requested access. The server MUST increment the HandleCount field of the service record and return this handle by setting the lpScHandle parameter.