EnableMenuItem

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

BOOL EnableMenuItem(
    HMENU hMenu,
    DWORD uIDEnableItem,
    MENU_ITEM_FLAGS uEnable
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function EnableMenuItem(
    hMenu As IntPtr,   ' HMENU
    uIDEnableItem As UInteger,   ' DWORD
    uEnable As UInteger   ' MENU_ITEM_FLAGS
) As Boolean
End Function

' hMenu : HMENU
' uIDEnableItem : DWORD
' uEnable : MENU_ITEM_FLAGS
Declare PtrSafe Function EnableMenuItem Lib "user32" ( _
    ByVal hMenu As LongPtr, _
    ByVal uIDEnableItem As Long, _
    ByVal uEnable As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

EnableMenuItem = ctypes.windll.user32.EnableMenuItem
EnableMenuItem.restype = wintypes.BOOL
EnableMenuItem.argtypes = [
    wintypes.HANDLE,  # hMenu : HMENU
    wintypes.DWORD,  # uIDEnableItem : DWORD
    wintypes.DWORD,  # uEnable : MENU_ITEM_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
EnableMenuItem = Fiddle::Function.new(
  lib['EnableMenuItem'],
  [
    Fiddle::TYPE_VOIDP,  # hMenu : HMENU
    -Fiddle::TYPE_INT,  # uIDEnableItem : DWORD
    -Fiddle::TYPE_INT,  # uEnable : MENU_ITEM_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn EnableMenuItem(
        hMenu: *mut core::ffi::c_void,  // HMENU
        uIDEnableItem: u32,  // DWORD
        uEnable: u32  // MENU_ITEM_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll")]
public static extern bool EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_EnableMenuItem' -Namespace Win32 -PassThru
# $api::EnableMenuItem(hMenu, uIDEnableItem, uEnable)

#uselib "USER32.dll"
#func global EnableMenuItem "EnableMenuItem" sptr, sptr, sptr
; EnableMenuItem hMenu, uIDEnableItem, uEnable   ; 戻り値は stat
; hMenu : HMENU -> "sptr"
; uIDEnableItem : DWORD -> "sptr"
; uEnable : MENU_ITEM_FLAGS -> "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 EnableMenuItem "EnableMenuItem" sptr, int, int
; res = EnableMenuItem(hMenu, uIDEnableItem, uEnable)
; hMenu : HMENU -> "sptr"
; uIDEnableItem : DWORD -> "int"
; uEnable : MENU_ITEM_FLAGS -> "int"

; BOOL EnableMenuItem(HMENU hMenu, DWORD uIDEnableItem, MENU_ITEM_FLAGS uEnable)
#uselib "USER32.dll"
#cfunc global EnableMenuItem "EnableMenuItem" intptr, int, int
; res = EnableMenuItem(hMenu, uIDEnableItem, uEnable)
; hMenu : HMENU -> "intptr"
; uIDEnableItem : DWORD -> "int"
; uEnable : MENU_ITEM_FLAGS -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procEnableMenuItem = user32.NewProc("EnableMenuItem")
)

// hMenu (HMENU), uIDEnableItem (DWORD), uEnable (MENU_ITEM_FLAGS)
r1, _, err := procEnableMenuItem.Call(
	uintptr(hMenu),
	uintptr(uIDEnableItem),
	uintptr(uEnable),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnableMenuItem(
  hMenu: THandle;   // HMENU
  uIDEnableItem: DWORD;   // DWORD
  uEnable: DWORD   // MENU_ITEM_FLAGS
): BOOL; stdcall;
  external 'USER32.dll' name 'EnableMenuItem';

result := DllCall("USER32\EnableMenuItem"
    , "Ptr", hMenu   ; HMENU
    , "UInt", uIDEnableItem   ; DWORD
    , "UInt", uEnable   ; MENU_ITEM_FLAGS
    , "Int")   ; return: BOOL

●EnableMenuItem(hMenu, uIDEnableItem, uEnable) = DLL("USER32.dll", "bool EnableMenuItem(void*, dword, dword)")
# 呼び出し: EnableMenuItem(hMenu, uIDEnableItem, uEnable)
# hMenu : HMENU -> "void*"
# uIDEnableItem : DWORD -> "dword"
# uEnable : MENU_ITEM_FLAGS -> "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)。