LINEMESSAGE

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct LINEMESSAGE
{
    public uint hDevice;
    public uint dwMessageID;
    public UIntPtr dwCallbackInstance;
    public UIntPtr dwParam1;
    public UIntPtr dwParam2;
    public UIntPtr dwParam3;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure LINEMESSAGE
    Public hDevice As UInteger
    Public dwMessageID As UInteger
    Public dwCallbackInstance As UIntPtr
    Public dwParam1 As UIntPtr
    Public dwParam2 As UIntPtr
    Public dwParam3 As UIntPtr
End Structure

import ctypes
from ctypes import wintypes

class LINEMESSAGE(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("hDevice", wintypes.DWORD),
        ("dwMessageID", wintypes.DWORD),
        ("dwCallbackInstance", ctypes.c_size_t),
        ("dwParam1", ctypes.c_size_t),
        ("dwParam2", ctypes.c_size_t),
        ("dwParam3", ctypes.c_size_t),
    ]

#[repr(C, packed(1))]
pub struct LINEMESSAGE {
    pub hDevice: u32,
    pub dwMessageID: u32,
    pub dwCallbackInstance: usize,
    pub dwParam1: usize,
    pub dwParam2: usize,
    pub dwParam3: usize,
}

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

type LINEMESSAGE struct {
	hDevice uint32
	dwMessageID uint32
	dwCallbackInstance uintptr
	dwParam1 uintptr
	dwParam2 uintptr
	dwParam3 uintptr
}

type
  LINEMESSAGE = packed record
    hDevice: DWORD;
    dwMessageID: DWORD;
    dwCallbackInstance: NativeUInt;
    dwParam1: NativeUInt;
    dwParam2: NativeUInt;
    dwParam3: NativeUInt;
  end;

const LINEMESSAGE = extern struct {
    hDevice: u32,
    dwMessageID: u32,
    dwCallbackInstance: usize,
    dwParam1: usize,
    dwParam2: usize,
    dwParam3: usize,
};

type
  LINEMESSAGE {.packed.} = object
    hDevice: uint32
    dwMessageID: uint32
    dwCallbackInstance: uint
    dwParam1: uint
    dwParam2: uint
    dwParam3: uint

align(1)
struct LINEMESSAGE
{
    uint hDevice;
    uint dwMessageID;
    size_t dwCallbackInstance;
    size_t dwParam1;
    size_t dwParam2;
    size_t dwParam3;
}