SystemParametersInfoW

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

BOOL SystemParametersInfoW(
    SYSTEM_PARAMETERS_INFO_ACTION uiAction,
    DWORD uiParam,
    void* pvParam,   // optional
    SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS fWinIni
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SystemParametersInfoW(
    uiAction As UInteger,   ' SYSTEM_PARAMETERS_INFO_ACTION
    uiParam As UInteger,   ' DWORD
    pvParam As IntPtr,   ' void* optional, in/out
    fWinIni As UInteger   ' SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
) As Boolean
End Function

' uiAction : SYSTEM_PARAMETERS_INFO_ACTION
' uiParam : DWORD
' pvParam : void* optional, in/out
' fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
Declare PtrSafe Function SystemParametersInfoW Lib "user32" ( _
    ByVal uiAction As Long, _
    ByVal uiParam As Long, _
    ByVal pvParam As LongPtr, _
    ByVal fWinIni As Long) 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

SystemParametersInfoW = ctypes.windll.user32.SystemParametersInfoW
SystemParametersInfoW.restype = wintypes.BOOL
SystemParametersInfoW.argtypes = [
    wintypes.DWORD,  # uiAction : SYSTEM_PARAMETERS_INFO_ACTION
    wintypes.DWORD,  # uiParam : DWORD
    ctypes.POINTER(None),  # pvParam : void* optional, in/out
    wintypes.DWORD,  # fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SystemParametersInfoW = Fiddle::Function.new(
  lib['SystemParametersInfoW'],
  [
    -Fiddle::TYPE_INT,  # uiAction : SYSTEM_PARAMETERS_INFO_ACTION
    -Fiddle::TYPE_INT,  # uiParam : DWORD
    Fiddle::TYPE_VOIDP,  # pvParam : void* optional, in/out
    -Fiddle::TYPE_INT,  # fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn SystemParametersInfoW(
        uiAction: u32,  // SYSTEM_PARAMETERS_INFO_ACTION
        uiParam: u32,  // DWORD
        pvParam: *mut (),  // void* optional, in/out
        fWinIni: u32  // SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
    ) -> 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 SystemParametersInfoW(uint uiAction, uint uiParam, IntPtr pvParam, uint fWinIni);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SystemParametersInfoW' -Namespace Win32 -PassThru
# $api::SystemParametersInfoW(uiAction, uiParam, pvParam, fWinIni)

#uselib "USER32.dll"
#func global SystemParametersInfoW "SystemParametersInfoW" wptr, wptr, wptr, wptr
; SystemParametersInfoW uiAction, uiParam, pvParam, fWinIni   ; 戻り値は stat
; uiAction : SYSTEM_PARAMETERS_INFO_ACTION -> "wptr"
; uiParam : DWORD -> "wptr"
; pvParam : void* optional, in/out -> "wptr"
; fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS -> "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 SystemParametersInfoW "SystemParametersInfoW" int, int, sptr, int
; res = SystemParametersInfoW(uiAction, uiParam, pvParam, fWinIni)
; uiAction : SYSTEM_PARAMETERS_INFO_ACTION -> "int"
; uiParam : DWORD -> "int"
; pvParam : void* optional, in/out -> "sptr"
; fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS -> "int"

; BOOL SystemParametersInfoW(SYSTEM_PARAMETERS_INFO_ACTION uiAction, DWORD uiParam, void* pvParam, SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS fWinIni)
#uselib "USER32.dll"
#cfunc global SystemParametersInfoW "SystemParametersInfoW" int, int, intptr, int
; res = SystemParametersInfoW(uiAction, uiParam, pvParam, fWinIni)
; uiAction : SYSTEM_PARAMETERS_INFO_ACTION -> "int"
; uiParam : DWORD -> "int"
; pvParam : void* optional, in/out -> "intptr"
; fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS -> "int"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procSystemParametersInfoW = user32.NewProc("SystemParametersInfoW")
)

// uiAction (SYSTEM_PARAMETERS_INFO_ACTION), uiParam (DWORD), pvParam (void* optional, in/out), fWinIni (SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS)
r1, _, err := procSystemParametersInfoW.Call(
	uintptr(uiAction),
	uintptr(uiParam),
	uintptr(pvParam),
	uintptr(fWinIni),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SystemParametersInfoW(
  uiAction: DWORD;   // SYSTEM_PARAMETERS_INFO_ACTION
  uiParam: DWORD;   // DWORD
  pvParam: Pointer;   // void* optional, in/out
  fWinIni: DWORD   // SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
): BOOL; stdcall;
  external 'USER32.dll' name 'SystemParametersInfoW';

result := DllCall("USER32\SystemParametersInfoW"
    , "UInt", uiAction   ; SYSTEM_PARAMETERS_INFO_ACTION
    , "UInt", uiParam   ; DWORD
    , "Ptr", pvParam   ; void* optional, in/out
    , "UInt", fWinIni   ; SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS
    , "Int")   ; return: BOOL

●SystemParametersInfoW(uiAction, uiParam, pvParam, fWinIni) = DLL("USER32.dll", "bool SystemParametersInfoW(dword, dword, void*, dword)")
# 呼び出し: SystemParametersInfoW(uiAction, uiParam, pvParam, fWinIni)
# uiAction : SYSTEM_PARAMETERS_INFO_ACTION -> "dword"
# uiParam : DWORD -> "dword"
# pvParam : void* optional, in/out -> "void*"
# fWinIni : SYSTEM_PARAMETERS_INFO_UPDATE_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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。