UnhookWindowsHook

// USER32.dll
#include <windows.h>

BOOL UnhookWindowsHook(
    INT nCode,
    HOOKPROC pfnFilterProc
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function UnhookWindowsHook(
    nCode As Integer,   ' INT
    pfnFilterProc As IntPtr   ' HOOKPROC
) As Boolean
End Function

' nCode : INT
' pfnFilterProc : HOOKPROC
Declare PtrSafe Function UnhookWindowsHook Lib "user32" ( _
    ByVal nCode As Long, _
    ByVal pfnFilterProc As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

UnhookWindowsHook = ctypes.windll.user32.UnhookWindowsHook
UnhookWindowsHook.restype = wintypes.BOOL
UnhookWindowsHook.argtypes = [
    ctypes.c_int,  # nCode : INT
    ctypes.c_void_p,  # pfnFilterProc : HOOKPROC
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
UnhookWindowsHook = Fiddle::Function.new(
  lib['UnhookWindowsHook'],
  [
    Fiddle::TYPE_INT,  # nCode : INT
    Fiddle::TYPE_VOIDP,  # pfnFilterProc : HOOKPROC
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn UnhookWindowsHook(
        nCode: i32,  // INT
        pfnFilterProc: *const core::ffi::c_void  // HOOKPROC
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll")]
public static extern bool UnhookWindowsHook(int nCode, IntPtr pfnFilterProc);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_UnhookWindowsHook' -Namespace Win32 -PassThru
# $api::UnhookWindowsHook(nCode, pfnFilterProc)

#uselib "USER32.dll"
#func global UnhookWindowsHook "UnhookWindowsHook" sptr, sptr
; UnhookWindowsHook nCode, pfnFilterProc   ; 戻り値は stat
; nCode : INT -> "sptr"
; pfnFilterProc : HOOKPROC -> "sptr"
; ※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 UnhookWindowsHook "UnhookWindowsHook" int, sptr
; res = UnhookWindowsHook(nCode, pfnFilterProc)
; nCode : INT -> "int"
; pfnFilterProc : HOOKPROC -> "sptr"

; BOOL UnhookWindowsHook(INT nCode, HOOKPROC pfnFilterProc)
#uselib "USER32.dll"
#cfunc global UnhookWindowsHook "UnhookWindowsHook" int, intptr
; res = UnhookWindowsHook(nCode, pfnFilterProc)
; nCode : INT -> "int"
; pfnFilterProc : HOOKPROC -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procUnhookWindowsHook = user32.NewProc("UnhookWindowsHook")
)

// nCode (INT), pfnFilterProc (HOOKPROC)
r1, _, err := procUnhookWindowsHook.Call(
	uintptr(nCode),
	uintptr(pfnFilterProc),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function UnhookWindowsHook(
  nCode: Integer;   // INT
  pfnFilterProc: Pointer   // HOOKPROC
): BOOL; stdcall;
  external 'USER32.dll' name 'UnhookWindowsHook';

result := DllCall("USER32\UnhookWindowsHook"
    , "Int", nCode   ; INT
    , "Ptr", pfnFilterProc   ; HOOKPROC
    , "Int")   ; return: BOOL

●UnhookWindowsHook(nCode, pfnFilterProc) = DLL("USER32.dll", "bool UnhookWindowsHook(int, void*)")
# 呼び出し: UnhookWindowsHook(nCode, pfnFilterProc)
# nCode : INT -> "int"
# pfnFilterProc : HOOKPROC -> "void*"
# 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)。