C# Definition:

struct USN_RECORD {
        public UInt32 RecordLength;
        public UInt16 MajorVersion;
        public UInt16 MinorVersion;
        public UInt64 FileReferenceNumber;
        public UInt64 ParentFileReferenceNumber;
        public Int64 Usn;
        public Int64 TimeStamp;  // strictly, this is a LARGE_INTEGER in C
        public UInt32 Reason;
        public UInt32 SourceInfo;
        public UInt32 SecurityId;
        public UInt32 FileAttributes;
        public UInt16 FileNameLength;
        public UInt16 FileNameOffset;
        // immediately after the FileNameOffset comes an array of WCHARs containing the FileName
}

VB Definition:

<StructLayout(LayoutKind.Explicit)> Private Structure USN_RECORD
        <FieldOffset(0)> Public RecordLength As Integer         'DWORD RecordLength;
        <FieldOffset(4)> Public MajorVersion As Short           'WORD MajorVersion;  
        <FieldOffset(6)> Public MinorVersion As Short           'WORD MinorVersion;  
        <FieldOffset(8)> Public FileReferenceNumber As Long     'DWORDLONG FileReferenceNumber;  
        <FieldOffset(16)> Public ParentFileReferenceNumber As Long  'DWORDLONG ParentFileReferenceNumber;
        <FieldOffset(24)> Public Usn As Long            'USN Usn;
        <FieldOffset(32)> Public TimeStamp As Long          'LARGE_INTEGER TimeStamp;
        <FieldOffset(40)> Public Reason As Integer          'DWORD Reason;
        <FieldOffset(44)> Public SourceInfo As Integer          'DWORD SourceInfo;
        <FieldOffset(48)> Public SecurityID As Integer          'DWORD SecurityId;
        <FieldOffset(52)> Public FileAttributes As Integer      'DWORD FileAttributes;  
        <FieldOffset(56)> Public FileNameLength As Short        'WORD FileNameLength;
        <FieldOffset(58)> Public FileNameOffset As Short        'WORD FileNameOffset;  
        <FieldOffset(60)> Public FileName As Char           'WCHAR FileName[1];
End Structure

User-Defined Field Types:

None.

Notes:

None.