WTSINFOEX_LEVEL_A

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct WTSINFOEX_LEVEL1_A
{
    public uint SessionId;
    public int SessionState;
    public int SessionFlags;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 33)] public sbyte[] WinStationName;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 21)] public sbyte[] UserName;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 18)] public sbyte[] DomainName;
    public long LogonTime;
    public long ConnectTime;
    public long DisconnectTime;
    public long LastInputTime;
    public long CurrentTime;
    public uint IncomingBytes;
    public uint OutgoingBytes;
    public uint IncomingFrames;
    public uint OutgoingFrames;
    public uint IncomingCompressedBytes;
    public uint OutgoingCompressedBytes;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct WTSINFOEX_LEVEL_A
{
    public WTSINFOEX_LEVEL1_A WTSInfoExLevel1;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure WTSINFOEX_LEVEL1_A
    Public SessionId As UInteger
    Public SessionState As Integer
    Public SessionFlags As Integer
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=33)> Public WinStationName() As SByte
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=21)> Public UserName() As SByte
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=18)> Public DomainName() As SByte
    Public LogonTime As Long
    Public ConnectTime As Long
    Public DisconnectTime As Long
    Public LastInputTime As Long
    Public CurrentTime As Long
    Public IncomingBytes As UInteger
    Public OutgoingBytes As UInteger
    Public IncomingFrames As UInteger
    Public OutgoingFrames As UInteger
    Public IncomingCompressedBytes As UInteger
    Public OutgoingCompressedBytes As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure WTSINFOEX_LEVEL_A
    Public WTSInfoExLevel1 As WTSINFOEX_LEVEL1_A
End Structure

import ctypes
from ctypes import wintypes

class WTSINFOEX_LEVEL1_A(ctypes.Structure):
    _fields_ = [
        ("SessionId", wintypes.DWORD),
        ("SessionState", ctypes.c_int),
        ("SessionFlags", ctypes.c_int),
        ("WinStationName", ctypes.c_byte * 33),
        ("UserName", ctypes.c_byte * 21),
        ("DomainName", ctypes.c_byte * 18),
        ("LogonTime", ctypes.c_longlong),
        ("ConnectTime", ctypes.c_longlong),
        ("DisconnectTime", ctypes.c_longlong),
        ("LastInputTime", ctypes.c_longlong),
        ("CurrentTime", ctypes.c_longlong),
        ("IncomingBytes", wintypes.DWORD),
        ("OutgoingBytes", wintypes.DWORD),
        ("IncomingFrames", wintypes.DWORD),
        ("OutgoingFrames", wintypes.DWORD),
        ("IncomingCompressedBytes", wintypes.DWORD),
        ("OutgoingCompressedBytes", wintypes.DWORD),
    ]

class WTSINFOEX_LEVEL_A(ctypes.Structure):
    _fields_ = [
        ("WTSInfoExLevel1", WTSINFOEX_LEVEL1_A),
    ]

#[repr(C)]
pub struct WTSINFOEX_LEVEL1_A {
    pub SessionId: u32,
    pub SessionState: i32,
    pub SessionFlags: i32,
    pub WinStationName: [i8; 33],
    pub UserName: [i8; 21],
    pub DomainName: [i8; 18],
    pub LogonTime: i64,
    pub ConnectTime: i64,
    pub DisconnectTime: i64,
    pub LastInputTime: i64,
    pub CurrentTime: i64,
    pub IncomingBytes: u32,
    pub OutgoingBytes: u32,
    pub IncomingFrames: u32,
    pub OutgoingFrames: u32,
    pub IncomingCompressedBytes: u32,
    pub OutgoingCompressedBytes: u32,
}

#[repr(C)]
pub struct WTSINFOEX_LEVEL_A {
    pub WTSInfoExLevel1: WTSINFOEX_LEVEL1_A,
}

import "golang.org/x/sys/windows"

type WTSINFOEX_LEVEL1_A struct {
	SessionId uint32
	SessionState int32
	SessionFlags int32
	WinStationName [33]int8
	UserName [21]int8
	DomainName [18]int8
	LogonTime int64
	ConnectTime int64
	DisconnectTime int64
	LastInputTime int64
	CurrentTime int64
	IncomingBytes uint32
	OutgoingBytes uint32
	IncomingFrames uint32
	OutgoingFrames uint32
	IncomingCompressedBytes uint32
	OutgoingCompressedBytes uint32
}

type WTSINFOEX_LEVEL_A struct {
	WTSInfoExLevel1 WTSINFOEX_LEVEL1_A
}

type
  WTSINFOEX_LEVEL1_A = record
    SessionId: DWORD;
    SessionState: Integer;
    SessionFlags: Integer;
    WinStationName: array[0..32] of Shortint;
    UserName: array[0..20] of Shortint;
    DomainName: array[0..17] of Shortint;
    LogonTime: Int64;
    ConnectTime: Int64;
    DisconnectTime: Int64;
    LastInputTime: Int64;
    CurrentTime: Int64;
    IncomingBytes: DWORD;
    OutgoingBytes: DWORD;
    IncomingFrames: DWORD;
    OutgoingFrames: DWORD;
    IncomingCompressedBytes: DWORD;
    OutgoingCompressedBytes: DWORD;
  end;

  WTSINFOEX_LEVEL_A = record
    WTSInfoExLevel1: WTSINFOEX_LEVEL1_A;
  end;

const WTSINFOEX_LEVEL1_A = extern struct {
    SessionId: u32,
    SessionState: i32,
    SessionFlags: i32,
    WinStationName: [33]i8,
    UserName: [21]i8,
    DomainName: [18]i8,
    LogonTime: i64,
    ConnectTime: i64,
    DisconnectTime: i64,
    LastInputTime: i64,
    CurrentTime: i64,
    IncomingBytes: u32,
    OutgoingBytes: u32,
    IncomingFrames: u32,
    OutgoingFrames: u32,
    IncomingCompressedBytes: u32,
    OutgoingCompressedBytes: u32,
};

const WTSINFOEX_LEVEL_A = extern struct {
    WTSInfoExLevel1: WTSINFOEX_LEVEL1_A,
};

type
  WTSINFOEX_LEVEL1_A {.bycopy.} = object
    SessionId: uint32
    SessionState: int32
    SessionFlags: int32
    WinStationName: array[33, int8]
    UserName: array[21, int8]
    DomainName: array[18, int8]
    LogonTime: int64
    ConnectTime: int64
    DisconnectTime: int64
    LastInputTime: int64
    CurrentTime: int64
    IncomingBytes: uint32
    OutgoingBytes: uint32
    IncomingFrames: uint32
    OutgoingFrames: uint32
    IncomingCompressedBytes: uint32
    OutgoingCompressedBytes: uint32

  WTSINFOEX_LEVEL_A {.bycopy.} = object
    WTSInfoExLevel1: WTSINFOEX_LEVEL1_A

struct WTSINFOEX_LEVEL1_A
{
    uint SessionId;
    int SessionState;
    int SessionFlags;
    byte[33] WinStationName;
    byte[21] UserName;
    byte[18] DomainName;
    long LogonTime;
    long ConnectTime;
    long DisconnectTime;
    long LastInputTime;
    long CurrentTime;
    uint IncomingBytes;
    uint OutgoingBytes;
    uint IncomingFrames;
    uint OutgoingFrames;
    uint IncomingCompressedBytes;
    uint OutgoingCompressedBytes;
}

struct WTSINFOEX_LEVEL_A
{
    WTSINFOEX_LEVEL1_A WTSInfoExLevel1;
}