SetWindowsHookExW

// USER32.dll  (Unicode / -W)
#include <windows.h>

HHOOK SetWindowsHookExW(
    WINDOWS_HOOK_ID idHook,
    HOOKPROC lpfn,
    HINSTANCE hmod,   // optional
    DWORD dwThreadId
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetWindowsHookExW(
    idHook As Integer,   ' WINDOWS_HOOK_ID
    lpfn As IntPtr,   ' HOOKPROC
    hmod As IntPtr,   ' HINSTANCE optional
    dwThreadId As UInteger   ' DWORD
) As IntPtr
End Function

' idHook : WINDOWS_HOOK_ID
' lpfn : HOOKPROC
' hmod : HINSTANCE optional
' dwThreadId : DWORD
Declare PtrSafe Function SetWindowsHookExW Lib "user32" ( _
    ByVal idHook As Long, _
    ByVal lpfn As LongPtr, _
    ByVal hmod As LongPtr, _
    ByVal dwThreadId As Long) As LongPtr
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetWindowsHookExW = ctypes.windll.user32.SetWindowsHookExW
SetWindowsHookExW.restype = ctypes.c_void_p
SetWindowsHookExW.argtypes = [
    ctypes.c_int,  # idHook : WINDOWS_HOOK_ID
    ctypes.c_void_p,  # lpfn : HOOKPROC
    wintypes.HANDLE,  # hmod : HINSTANCE optional
    wintypes.DWORD,  # dwThreadId : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SetWindowsHookExW = Fiddle::Function.new(
  lib['SetWindowsHookExW'],
  [
    Fiddle::TYPE_INT,  # idHook : WINDOWS_HOOK_ID
    Fiddle::TYPE_VOIDP,  # lpfn : HOOKPROC
    Fiddle::TYPE_VOIDP,  # hmod : HINSTANCE optional
    -Fiddle::TYPE_INT,  # dwThreadId : DWORD
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn SetWindowsHookExW(
        idHook: i32,  // WINDOWS_HOOK_ID
        lpfn: *const core::ffi::c_void,  // HOOKPROC
        hmod: *mut core::ffi::c_void,  // HINSTANCE optional
        dwThreadId: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr SetWindowsHookExW(int idHook, IntPtr lpfn, IntPtr hmod, uint dwThreadId);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SetWindowsHookExW' -Namespace Win32 -PassThru
# $api::SetWindowsHookExW(idHook, lpfn, hmod, dwThreadId)

#uselib "USER32.dll"
#func global SetWindowsHookExW "SetWindowsHookExW" wptr, wptr, wptr, wptr
; SetWindowsHookExW idHook, lpfn, hmod, dwThreadId   ; 戻り値は stat
; idHook : WINDOWS_HOOK_ID -> "wptr"
; lpfn : HOOKPROC -> "wptr"
; hmod : HINSTANCE optional -> "wptr"
; dwThreadId : DWORD -> "wptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "USER32.dll"
#cfunc global SetWindowsHookExW "SetWindowsHookExW" int, sptr, sptr, int
; res = SetWindowsHookExW(idHook, lpfn, hmod, dwThreadId)
; idHook : WINDOWS_HOOK_ID -> "int"
; lpfn : HOOKPROC -> "sptr"
; hmod : HINSTANCE optional -> "sptr"
; dwThreadId : DWORD -> "int"

; HHOOK SetWindowsHookExW(WINDOWS_HOOK_ID idHook, HOOKPROC lpfn, HINSTANCE hmod, DWORD dwThreadId)
#uselib "USER32.dll"
#cfunc global SetWindowsHookExW "SetWindowsHookExW" int, intptr, intptr, int
; res = SetWindowsHookExW(idHook, lpfn, hmod, dwThreadId)
; idHook : WINDOWS_HOOK_ID -> "int"
; lpfn : HOOKPROC -> "intptr"
; hmod : HINSTANCE optional -> "intptr"
; dwThreadId : DWORD -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procSetWindowsHookExW = user32.NewProc("SetWindowsHookExW")
)

// idHook (WINDOWS_HOOK_ID), lpfn (HOOKPROC), hmod (HINSTANCE optional), dwThreadId (DWORD)
r1, _, err := procSetWindowsHookExW.Call(
	uintptr(idHook),
	uintptr(lpfn),
	uintptr(hmod),
	uintptr(dwThreadId),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HHOOK

function SetWindowsHookExW(
  idHook: Integer;   // WINDOWS_HOOK_ID
  lpfn: Pointer;   // HOOKPROC
  hmod: THandle;   // HINSTANCE optional
  dwThreadId: DWORD   // DWORD
): THandle; stdcall;
  external 'USER32.dll' name 'SetWindowsHookExW';

result := DllCall("USER32\SetWindowsHookExW"
    , "Int", idHook   ; WINDOWS_HOOK_ID
    , "Ptr", lpfn   ; HOOKPROC
    , "Ptr", hmod   ; HINSTANCE optional
    , "UInt", dwThreadId   ; DWORD
    , "Ptr")   ; return: HHOOK

●SetWindowsHookExW(idHook, lpfn, hmod, dwThreadId) = DLL("USER32.dll", "void* SetWindowsHookExW(int, void*, void*, dword)")
# 呼び出し: SetWindowsHookExW(idHook, lpfn, hmod, dwThreadId)
# idHook : WINDOWS_HOOK_ID -> "int"
# lpfn : HOOKPROC -> "void*"
# hmod : HINSTANCE optional -> "void*"
# dwThreadId : DWORD -> "dword"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。