GetKeyboardLayoutNameW

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

BOOL GetKeyboardLayoutNameW(
    LPWSTR pwszKLID
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetKeyboardLayoutNameW(
    <MarshalAs(UnmanagedType.LPWStr)> pwszKLID As System.Text.StringBuilder   ' LPWSTR out
) As Boolean
End Function

' pwszKLID : LPWSTR out
Declare PtrSafe Function GetKeyboardLayoutNameW Lib "user32" ( _
    ByVal pwszKLID As LongPtr) As Long
' 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

GetKeyboardLayoutNameW = ctypes.windll.user32.GetKeyboardLayoutNameW
GetKeyboardLayoutNameW.restype = wintypes.BOOL
GetKeyboardLayoutNameW.argtypes = [
    wintypes.LPWSTR,  # pwszKLID : LPWSTR out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetKeyboardLayoutNameW = Fiddle::Function.new(
  lib['GetKeyboardLayoutNameW'],
  [
    Fiddle::TYPE_VOIDP,  # pwszKLID : LPWSTR out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn GetKeyboardLayoutNameW(
        pwszKLID: *mut u16  // LPWSTR out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool GetKeyboardLayoutNameW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pwszKLID);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetKeyboardLayoutNameW' -Namespace Win32 -PassThru
# $api::GetKeyboardLayoutNameW(pwszKLID)

#uselib "USER32.dll"
#func global GetKeyboardLayoutNameW "GetKeyboardLayoutNameW" wptr
; GetKeyboardLayoutNameW varptr(pwszKLID)   ; 戻り値は stat
; pwszKLID : LPWSTR out -> "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 GetKeyboardLayoutNameW "GetKeyboardLayoutNameW" var
; res = GetKeyboardLayoutNameW(pwszKLID)
; pwszKLID : LPWSTR out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL GetKeyboardLayoutNameW(LPWSTR pwszKLID)
#uselib "USER32.dll"
#cfunc global GetKeyboardLayoutNameW "GetKeyboardLayoutNameW" var
; res = GetKeyboardLayoutNameW(pwszKLID)
; pwszKLID : LPWSTR out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procGetKeyboardLayoutNameW = user32.NewProc("GetKeyboardLayoutNameW")
)

// pwszKLID (LPWSTR out)
r1, _, err := procGetKeyboardLayoutNameW.Call(
	uintptr(pwszKLID),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetKeyboardLayoutNameW(
  pwszKLID: PWideChar   // LPWSTR out
): BOOL; stdcall;
  external 'USER32.dll' name 'GetKeyboardLayoutNameW';

result := DllCall("USER32\GetKeyboardLayoutNameW"
    , "Ptr", pwszKLID   ; LPWSTR out
    , "Int")   ; return: BOOL

●GetKeyboardLayoutNameW(pwszKLID) = DLL("USER32.dll", "bool GetKeyboardLayoutNameW(char*)")
# 呼び出し: GetKeyboardLayoutNameW(pwszKLID)
# pwszKLID : LPWSTR out -> "char*"
# 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。