SELCHANGE

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NMHDR
{
    public IntPtr hwndFrom;
    public UIntPtr idFrom;
    public uint code;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct CHARRANGE
{
    public int cpMin;
    public int cpMax;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct SELCHANGE
{
    public NMHDR nmhdr;
    public CHARRANGE chrg;
    public ushort seltyp;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NMHDR
    Public hwndFrom As IntPtr
    Public idFrom As UIntPtr
    Public code As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure CHARRANGE
    Public cpMin As Integer
    Public cpMax As Integer
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure SELCHANGE
    Public nmhdr As NMHDR
    Public chrg As CHARRANGE
    Public seltyp As UShort
End Structure

import ctypes
from ctypes import wintypes

class NMHDR(ctypes.Structure):
    _fields_ = [
        ("hwndFrom", ctypes.c_void_p),
        ("idFrom", ctypes.c_size_t),
        ("code", wintypes.DWORD),
    ]

class CHARRANGE(ctypes.Structure):
    _fields_ = [
        ("cpMin", ctypes.c_int),
        ("cpMax", ctypes.c_int),
    ]

class SELCHANGE(ctypes.Structure):
    _fields_ = [
        ("nmhdr", NMHDR),
        ("chrg", CHARRANGE),
        ("seltyp", ctypes.c_ushort),
    ]

#[repr(C)]
pub struct NMHDR {
    pub hwndFrom: *mut core::ffi::c_void,
    pub idFrom: usize,
    pub code: u32,
}

#[repr(C)]
pub struct CHARRANGE {
    pub cpMin: i32,
    pub cpMax: i32,
}

#[repr(C)]
pub struct SELCHANGE {
    pub nmhdr: NMHDR,
    pub chrg: CHARRANGE,
    pub seltyp: u16,
}

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

type NMHDR struct {
	hwndFrom uintptr
	idFrom uintptr
	code uint32
}

type CHARRANGE struct {
	cpMin int32
	cpMax int32
}

type SELCHANGE struct {
	nmhdr NMHDR
	chrg CHARRANGE
	seltyp uint16
}

type
  NMHDR = record
    hwndFrom: Pointer;
    idFrom: NativeUInt;
    code: DWORD;
  end;

  CHARRANGE = record
    cpMin: Integer;
    cpMax: Integer;
  end;

  SELCHANGE = record
    nmhdr: NMHDR;
    chrg: CHARRANGE;
    seltyp: Word;
  end;

const NMHDR = extern struct {
    hwndFrom: ?*anyopaque,
    idFrom: usize,
    code: u32,
};

const CHARRANGE = extern struct {
    cpMin: i32,
    cpMax: i32,
};

const SELCHANGE = extern struct {
    nmhdr: NMHDR,
    chrg: CHARRANGE,
    seltyp: u16,
};

type
  NMHDR {.bycopy.} = object
    hwndFrom: pointer
    idFrom: uint
    code: uint32

  CHARRANGE {.bycopy.} = object
    cpMin: int32
    cpMax: int32

  SELCHANGE {.bycopy.} = object
    nmhdr: NMHDR
    chrg: CHARRANGE
    seltyp: uint16

struct NMHDR
{
    void* hwndFrom;
    size_t idFrom;
    uint code;
}

struct CHARRANGE
{
    int cpMin;
    int cpMax;
}

struct SELCHANGE
{
    NMHDR nmhdr;
    CHARRANGE chrg;
    ushort seltyp;
}