VB中怎么定义RegCreateKeyEx这个API函数中的lpSecurityAttributes参数

Private Declare Function RegCreateKeyEx Lib "advapi32.dll" Alias "RegCreateKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, _
                                                                                    ByVal Reserved As Long, ByVal lpClass As String, _
                                                                                    ByVal dwOptions As Long, ByVal samDesired As Long, _
                                                                                    lpSecurityAttributes As SECURITY_ATTRIBUTES, phkResult As Long, _
                                                                                    lpdwDisposition As Long) As Long