KillTimer

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

BOOL KillTimer(
    HWND hWnd,   // optional
    UINT_PTR uIDEvent
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function KillTimer(
    hWnd As IntPtr,   ' HWND optional
    uIDEvent As UIntPtr   ' UINT_PTR
) As Boolean
End Function

' hWnd : HWND optional
' uIDEvent : UINT_PTR
Declare PtrSafe Function KillTimer Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal uIDEvent 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

KillTimer = ctypes.windll.user32.KillTimer
KillTimer.restype = wintypes.BOOL
KillTimer.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND optional
    ctypes.c_size_t,  # uIDEvent : UINT_PTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
KillTimer = Fiddle::Function.new(
  lib['KillTimer'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND optional
    Fiddle::TYPE_UINTPTR_T,  # uIDEvent : UINT_PTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn KillTimer(
        hWnd: *mut core::ffi::c_void,  // HWND optional
        uIDEvent: usize  // UINT_PTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true)]
public static extern bool KillTimer(IntPtr hWnd, UIntPtr uIDEvent);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_KillTimer' -Namespace Win32 -PassThru
# $api::KillTimer(hWnd, uIDEvent)

#uselib "USER32.dll"
#func global KillTimer "KillTimer" sptr, sptr
; KillTimer hWnd, uIDEvent   ; 戻り値は stat
; hWnd : HWND optional -> "sptr"
; uIDEvent : UINT_PTR -> "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 KillTimer "KillTimer" sptr, sptr
; res = KillTimer(hWnd, uIDEvent)
; hWnd : HWND optional -> "sptr"
; uIDEvent : UINT_PTR -> "sptr"

; BOOL KillTimer(HWND hWnd, UINT_PTR uIDEvent)
#uselib "USER32.dll"
#cfunc global KillTimer "KillTimer" intptr, intptr
; res = KillTimer(hWnd, uIDEvent)
; hWnd : HWND optional -> "intptr"
; uIDEvent : UINT_PTR -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procKillTimer = user32.NewProc("KillTimer")
)

// hWnd (HWND optional), uIDEvent (UINT_PTR)
r1, _, err := procKillTimer.Call(
	uintptr(hWnd),
	uintptr(uIDEvent),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function KillTimer(
  hWnd: THandle;   // HWND optional
  uIDEvent: NativeUInt   // UINT_PTR
): BOOL; stdcall;
  external 'USER32.dll' name 'KillTimer';

result := DllCall("USER32\KillTimer"
    , "Ptr", hWnd   ; HWND optional
    , "UPtr", uIDEvent   ; UINT_PTR
    , "Int")   ; return: BOOL

●KillTimer(hWnd, uIDEvent) = DLL("USER32.dll", "bool KillTimer(void*, int)")
# 呼び出し: KillTimer(hWnd, uIDEvent)
# hWnd : HWND optional -> "void*"
# uIDEvent : UINT_PTR -> "int"
# 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)。