ActivateKeyboardLayout

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

HKL ActivateKeyboardLayout(
    HKL hkl,
    ACTIVATE_KEYBOARD_LAYOUT_FLAGS Flags
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ActivateKeyboardLayout(
    hkl As IntPtr,   ' HKL
    Flags As UInteger   ' ACTIVATE_KEYBOARD_LAYOUT_FLAGS
) As IntPtr
End Function

' hkl : HKL
' Flags : ACTIVATE_KEYBOARD_LAYOUT_FLAGS
Declare PtrSafe Function ActivateKeyboardLayout Lib "user32" ( _
    ByVal hkl As LongPtr, _
    ByVal Flags As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ActivateKeyboardLayout = ctypes.windll.user32.ActivateKeyboardLayout
ActivateKeyboardLayout.restype = ctypes.c_void_p
ActivateKeyboardLayout.argtypes = [
    wintypes.HANDLE,  # hkl : HKL
    wintypes.DWORD,  # Flags : ACTIVATE_KEYBOARD_LAYOUT_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
ActivateKeyboardLayout = Fiddle::Function.new(
  lib['ActivateKeyboardLayout'],
  [
    Fiddle::TYPE_VOIDP,  # hkl : HKL
    -Fiddle::TYPE_INT,  # Flags : ACTIVATE_KEYBOARD_LAYOUT_FLAGS
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "user32")]
extern "system" {
    fn ActivateKeyboardLayout(
        hkl: *mut core::ffi::c_void,  // HKL
        Flags: u32  // ACTIVATE_KEYBOARD_LAYOUT_FLAGS
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", SetLastError = true)]
public static extern IntPtr ActivateKeyboardLayout(IntPtr hkl, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_ActivateKeyboardLayout' -Namespace Win32 -PassThru
# $api::ActivateKeyboardLayout(hkl, Flags)

#uselib "USER32.dll"
#func global ActivateKeyboardLayout "ActivateKeyboardLayout" sptr, sptr
; ActivateKeyboardLayout hkl, Flags   ; 戻り値は stat
; hkl : HKL -> "sptr"
; Flags : ACTIVATE_KEYBOARD_LAYOUT_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 ActivateKeyboardLayout "ActivateKeyboardLayout" sptr, int
; res = ActivateKeyboardLayout(hkl, Flags)
; hkl : HKL -> "sptr"
; Flags : ACTIVATE_KEYBOARD_LAYOUT_FLAGS -> "int"

; HKL ActivateKeyboardLayout(HKL hkl, ACTIVATE_KEYBOARD_LAYOUT_FLAGS Flags)
#uselib "USER32.dll"
#cfunc global ActivateKeyboardLayout "ActivateKeyboardLayout" intptr, int
; res = ActivateKeyboardLayout(hkl, Flags)
; hkl : HKL -> "intptr"
; Flags : ACTIVATE_KEYBOARD_LAYOUT_FLAGS -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procActivateKeyboardLayout = user32.NewProc("ActivateKeyboardLayout")
)

// hkl (HKL), Flags (ACTIVATE_KEYBOARD_LAYOUT_FLAGS)
r1, _, err := procActivateKeyboardLayout.Call(
	uintptr(hkl),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HKL

function ActivateKeyboardLayout(
  hkl: THandle;   // HKL
  Flags: DWORD   // ACTIVATE_KEYBOARD_LAYOUT_FLAGS
): THandle; stdcall;
  external 'USER32.dll' name 'ActivateKeyboardLayout';

result := DllCall("USER32\ActivateKeyboardLayout"
    , "Ptr", hkl   ; HKL
    , "UInt", Flags   ; ACTIVATE_KEYBOARD_LAYOUT_FLAGS
    , "Ptr")   ; return: HKL

●ActivateKeyboardLayout(hkl, Flags) = DLL("USER32.dll", "void* ActivateKeyboardLayout(void*, dword)")
# 呼び出し: ActivateKeyboardLayout(hkl, Flags)
# hkl : HKL -> "void*"
# Flags : ACTIVATE_KEYBOARD_LAYOUT_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)。