COMMPROP

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct COMMPROP
{
    public ushort wPacketLength;
    public ushort wPacketVersion;
    public uint dwServiceMask;
    public uint dwReserved1;
    public uint dwMaxTxQueue;
    public uint dwMaxRxQueue;
    public uint dwMaxBaud;
    public uint dwProvSubType;
    public uint dwProvCapabilities;
    public uint dwSettableParams;
    public uint dwSettableBaud;
    public ushort wSettableData;
    public ushort wSettableStopParity;
    public uint dwCurrentTxQueue;
    public uint dwCurrentRxQueue;
    public uint dwProvSpec1;
    public uint dwProvSpec2;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1)] public string wcProvChar;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure COMMPROP
    Public wPacketLength As UShort
    Public wPacketVersion As UShort
    Public dwServiceMask As UInteger
    Public dwReserved1 As UInteger
    Public dwMaxTxQueue As UInteger
    Public dwMaxRxQueue As UInteger
    Public dwMaxBaud As UInteger
    Public dwProvSubType As UInteger
    Public dwProvCapabilities As UInteger
    Public dwSettableParams As UInteger
    Public dwSettableBaud As UInteger
    Public wSettableData As UShort
    Public wSettableStopParity As UShort
    Public dwCurrentTxQueue As UInteger
    Public dwCurrentRxQueue As UInteger
    Public dwProvSpec1 As UInteger
    Public dwProvSpec2 As UInteger
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=1)> Public wcProvChar As String
End Structure

import ctypes
from ctypes import wintypes

class COMMPROP(ctypes.Structure):
    _fields_ = [
        ("wPacketLength", ctypes.c_ushort),
        ("wPacketVersion", ctypes.c_ushort),
        ("dwServiceMask", wintypes.DWORD),
        ("dwReserved1", wintypes.DWORD),
        ("dwMaxTxQueue", wintypes.DWORD),
        ("dwMaxRxQueue", wintypes.DWORD),
        ("dwMaxBaud", wintypes.DWORD),
        ("dwProvSubType", wintypes.DWORD),
        ("dwProvCapabilities", wintypes.DWORD),
        ("dwSettableParams", wintypes.DWORD),
        ("dwSettableBaud", wintypes.DWORD),
        ("wSettableData", ctypes.c_ushort),
        ("wSettableStopParity", ctypes.c_ushort),
        ("dwCurrentTxQueue", wintypes.DWORD),
        ("dwCurrentRxQueue", wintypes.DWORD),
        ("dwProvSpec1", wintypes.DWORD),
        ("dwProvSpec2", wintypes.DWORD),
        ("wcProvChar", ctypes.c_wchar * 1),
    ]

#[repr(C)]
pub struct COMMPROP {
    pub wPacketLength: u16,
    pub wPacketVersion: u16,
    pub dwServiceMask: u32,
    pub dwReserved1: u32,
    pub dwMaxTxQueue: u32,
    pub dwMaxRxQueue: u32,
    pub dwMaxBaud: u32,
    pub dwProvSubType: u32,
    pub dwProvCapabilities: u32,
    pub dwSettableParams: u32,
    pub dwSettableBaud: u32,
    pub wSettableData: u16,
    pub wSettableStopParity: u16,
    pub dwCurrentTxQueue: u32,
    pub dwCurrentRxQueue: u32,
    pub dwProvSpec1: u32,
    pub dwProvSpec2: u32,
    pub wcProvChar: [u16; 1],
}

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

type COMMPROP struct {
	wPacketLength uint16
	wPacketVersion uint16
	dwServiceMask uint32
	dwReserved1 uint32
	dwMaxTxQueue uint32
	dwMaxRxQueue uint32
	dwMaxBaud uint32
	dwProvSubType uint32
	dwProvCapabilities uint32
	dwSettableParams uint32
	dwSettableBaud uint32
	wSettableData uint16
	wSettableStopParity uint16
	dwCurrentTxQueue uint32
	dwCurrentRxQueue uint32
	dwProvSpec1 uint32
	dwProvSpec2 uint32
	wcProvChar [1]uint16
}

type
  COMMPROP = record
    wPacketLength: Word;
    wPacketVersion: Word;
    dwServiceMask: DWORD;
    dwReserved1: DWORD;
    dwMaxTxQueue: DWORD;
    dwMaxRxQueue: DWORD;
    dwMaxBaud: DWORD;
    dwProvSubType: DWORD;
    dwProvCapabilities: DWORD;
    dwSettableParams: DWORD;
    dwSettableBaud: DWORD;
    wSettableData: Word;
    wSettableStopParity: Word;
    dwCurrentTxQueue: DWORD;
    dwCurrentRxQueue: DWORD;
    dwProvSpec1: DWORD;
    dwProvSpec2: DWORD;
    wcProvChar: array[0..0] of WideChar;
  end;

const COMMPROP = extern struct {
    wPacketLength: u16,
    wPacketVersion: u16,
    dwServiceMask: u32,
    dwReserved1: u32,
    dwMaxTxQueue: u32,
    dwMaxRxQueue: u32,
    dwMaxBaud: u32,
    dwProvSubType: u32,
    dwProvCapabilities: u32,
    dwSettableParams: u32,
    dwSettableBaud: u32,
    wSettableData: u16,
    wSettableStopParity: u16,
    dwCurrentTxQueue: u32,
    dwCurrentRxQueue: u32,
    dwProvSpec1: u32,
    dwProvSpec2: u32,
    wcProvChar: [1]u16,
};

type
  COMMPROP {.bycopy.} = object
    wPacketLength: uint16
    wPacketVersion: uint16
    dwServiceMask: uint32
    dwReserved1: uint32
    dwMaxTxQueue: uint32
    dwMaxRxQueue: uint32
    dwMaxBaud: uint32
    dwProvSubType: uint32
    dwProvCapabilities: uint32
    dwSettableParams: uint32
    dwSettableBaud: uint32
    wSettableData: uint16
    wSettableStopParity: uint16
    dwCurrentTxQueue: uint32
    dwCurrentRxQueue: uint32
    dwProvSpec1: uint32
    dwProvSpec2: uint32
    wcProvChar: array[1, uint16]

struct COMMPROP
{
    ushort wPacketLength;
    ushort wPacketVersion;
    uint dwServiceMask;
    uint dwReserved1;
    uint dwMaxTxQueue;
    uint dwMaxRxQueue;
    uint dwMaxBaud;
    uint dwProvSubType;
    uint dwProvCapabilities;
    uint dwSettableParams;
    uint dwSettableBaud;
    ushort wSettableData;
    ushort wSettableStopParity;
    uint dwCurrentTxQueue;
    uint dwCurrentRxQueue;
    uint dwProvSpec1;
    uint dwProvSpec2;
    wchar[1] wcProvChar;
}