SetUserGeoName

// KERNEL32.dll
#include <windows.h>

BOOL SetUserGeoName(
    LPWSTR geoName
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetUserGeoName(
    <MarshalAs(UnmanagedType.LPWStr)> geoName As String   ' LPWSTR
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' geoName : LPWSTR
Declare PtrSafe Function SetUserGeoName Lib "kernel32" ( _
    ByVal geoName 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

SetUserGeoName = ctypes.windll.kernel32.SetUserGeoName
SetUserGeoName.restype = wintypes.BOOL
SetUserGeoName.argtypes = [
    wintypes.LPCWSTR,  # geoName : LPWSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetUserGeoName = Fiddle::Function.new(
  lib['SetUserGeoName'],
  [
    Fiddle::TYPE_VOIDP,  # geoName : LPWSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetUserGeoName(
        geoName: *mut u16  // LPWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool SetUserGeoName([MarshalAs(UnmanagedType.LPWStr)] string geoName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetUserGeoName' -Namespace Win32 -PassThru
# $api::SetUserGeoName(geoName)

#uselib "KERNEL32.dll"
#func global SetUserGeoName "SetUserGeoName" sptr
; SetUserGeoName geoName   ; 戻り値は stat
; geoName : LPWSTR -> "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 "KERNEL32.dll"
#cfunc global SetUserGeoName "SetUserGeoName" wstr
; res = SetUserGeoName(geoName)
; geoName : LPWSTR -> "wstr"

; BOOL SetUserGeoName(LPWSTR geoName)
#uselib "KERNEL32.dll"
#cfunc global SetUserGeoName "SetUserGeoName" wstr
; res = SetUserGeoName(geoName)
; geoName : LPWSTR -> "wstr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetUserGeoName = kernel32.NewProc("SetUserGeoName")
)

// geoName (LPWSTR)
r1, _, err := procSetUserGeoName.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(geoName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetUserGeoName(
  geoName: PWideChar   // LPWSTR
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetUserGeoName';

result := DllCall("KERNEL32\SetUserGeoName"
    , "WStr", geoName   ; LPWSTR
    , "Int")   ; return: BOOL

●SetUserGeoName(geoName) = DLL("KERNEL32.dll", "bool SetUserGeoName(char*)")
# 呼び出し: SetUserGeoName(geoName)
# geoName : LPWSTR -> "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)。

const std = @import("std");

extern "kernel32" fn SetUserGeoName(
    geoName: [*c]const u16 // LPWSTR
) callconv(std.os.windows.WINAPI) i32;

proc SetUserGeoName(
    geoName: WideCString  # LPWSTR
): int32 {.importc: "SetUserGeoName", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int SetUserGeoName(
    const(wchar)* geoName   // LPWSTR
);

ccall((:SetUserGeoName, "KERNEL32.dll"), stdcall, Int32,
      (Cwstring,),
      geoName)
# geoName : LPWSTR -> Cwstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t SetUserGeoName(
    const uint16_t* geoName);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.SetUserGeoName(geoName)
-- geoName : LPWSTR
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('KERNEL32.dll');
const SetUserGeoName = lib.func('__stdcall', 'SetUserGeoName', 'int32_t', ['str16']);
// SetUserGeoName(geoName)
// geoName : LPWSTR -> 'str16'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("KERNEL32.dll", {
  SetUserGeoName: { parameters: ["buffer"], result: "i32" },
});
// lib.symbols.SetUserGeoName(geoName)
// geoName : LPWSTR -> "buffer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t SetUserGeoName(
    const uint16_t* geoName);
C, "KERNEL32.dll");
// $ffi->SetUserGeoName(geoName);
// geoName : LPWSTR
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    boolean SetUserGeoName(
        WString geoName   // LPWSTR
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun SetUserGeoName = SetUserGeoName(
    geoName : UInt16*   # LPWSTR
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef SetUserGeoNameNative = Int32 Function(Pointer<Utf16>);
typedef SetUserGeoNameDart = int Function(Pointer<Utf16>);
final SetUserGeoName = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<SetUserGeoNameNative, SetUserGeoNameDart>('SetUserGeoName');
// geoName : LPWSTR -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SetUserGeoName(
  geoName: PWideChar   // LPWSTR
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetUserGeoName';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "SetUserGeoName"
  c_SetUserGeoName :: CWString -> IO CInt
-- geoName : LPWSTR -> CWString
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let setusergeoname =
  foreign "SetUserGeoName"
    ((ptr uint16_t) @-> returning int32_t)
(* geoName : LPWSTR -> (ptr uint16_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("SetUserGeoName" set-user-geo-name :convention :stdcall) :int32
  (geo-name (:string :encoding :utf-16le)))   ; LPWSTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SetUserGeoName = Win32::API::More->new('KERNEL32',
    'BOOL SetUserGeoName(LPCWSTR geoName)');
# my $ret = $SetUserGeoName->Call($geoName);
# geoName : LPWSTR -> LPCWSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。