BroadcastSystemMessageExW

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

INT BroadcastSystemMessageExW(
    BROADCAST_SYSTEM_MESSAGE_FLAGS flags,
    BROADCAST_SYSTEM_MESSAGE_INFO* lpInfo,   // optional
    DWORD Msg,
    WPARAM wParam,
    LPARAM lParam,
    BSMINFO* pbsmInfo   // optional
);

<DllImport("USER32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function BroadcastSystemMessageExW(
    flags As UInteger,   ' BROADCAST_SYSTEM_MESSAGE_FLAGS
    lpInfo As IntPtr,   ' BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
    Msg As UInteger,   ' DWORD
    wParam As UIntPtr,   ' WPARAM
    lParam As IntPtr,   ' LPARAM
    pbsmInfo As IntPtr   ' BSMINFO* optional, out
) As Integer
End Function

' flags : BROADCAST_SYSTEM_MESSAGE_FLAGS
' lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
' Msg : DWORD
' wParam : WPARAM
' lParam : LPARAM
' pbsmInfo : BSMINFO* optional, out
Declare PtrSafe Function BroadcastSystemMessageExW Lib "user32" ( _
    ByVal flags As Long, _
    ByVal lpInfo As LongPtr, _
    ByVal Msg As Long, _
    ByVal wParam As LongPtr, _
    ByVal lParam As LongPtr, _
    ByVal pbsmInfo 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

BroadcastSystemMessageExW = ctypes.windll.user32.BroadcastSystemMessageExW
BroadcastSystemMessageExW.restype = ctypes.c_int
BroadcastSystemMessageExW.argtypes = [
    wintypes.DWORD,  # flags : BROADCAST_SYSTEM_MESSAGE_FLAGS
    ctypes.c_void_p,  # lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
    wintypes.DWORD,  # Msg : DWORD
    ctypes.c_size_t,  # wParam : WPARAM
    ctypes.c_ssize_t,  # lParam : LPARAM
    ctypes.c_void_p,  # pbsmInfo : BSMINFO* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
BroadcastSystemMessageExW = Fiddle::Function.new(
  lib['BroadcastSystemMessageExW'],
  [
    -Fiddle::TYPE_INT,  # flags : BROADCAST_SYSTEM_MESSAGE_FLAGS
    Fiddle::TYPE_VOIDP,  # lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
    -Fiddle::TYPE_INT,  # Msg : DWORD
    Fiddle::TYPE_UINTPTR_T,  # wParam : WPARAM
    Fiddle::TYPE_INTPTR_T,  # lParam : LPARAM
    Fiddle::TYPE_VOIDP,  # pbsmInfo : BSMINFO* optional, out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn BroadcastSystemMessageExW(
        flags: u32,  // BROADCAST_SYSTEM_MESSAGE_FLAGS
        lpInfo: *mut u32,  // BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
        Msg: u32,  // DWORD
        wParam: usize,  // WPARAM
        lParam: isize,  // LPARAM
        pbsmInfo: *mut BSMINFO  // BSMINFO* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern int BroadcastSystemMessageExW(uint flags, IntPtr lpInfo, uint Msg, UIntPtr wParam, IntPtr lParam, IntPtr pbsmInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_BroadcastSystemMessageExW' -Namespace Win32 -PassThru
# $api::BroadcastSystemMessageExW(flags, lpInfo, Msg, wParam, lParam, pbsmInfo)

#uselib "USER32.dll"
#func global BroadcastSystemMessageExW "BroadcastSystemMessageExW" wptr, wptr, wptr, wptr, wptr, wptr
; BroadcastSystemMessageExW flags, lpInfo, Msg, wParam, lParam, varptr(pbsmInfo)   ; 戻り値は stat
; flags : BROADCAST_SYSTEM_MESSAGE_FLAGS -> "wptr"
; lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out -> "wptr"
; Msg : DWORD -> "wptr"
; wParam : WPARAM -> "wptr"
; lParam : LPARAM -> "wptr"
; pbsmInfo : BSMINFO* optional, 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 BroadcastSystemMessageExW "BroadcastSystemMessageExW" int, int, int, sptr, sptr, var
; res = BroadcastSystemMessageExW(flags, lpInfo, Msg, wParam, lParam, pbsmInfo)
; flags : BROADCAST_SYSTEM_MESSAGE_FLAGS -> "int"
; lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out -> "int"
; Msg : DWORD -> "int"
; wParam : WPARAM -> "sptr"
; lParam : LPARAM -> "sptr"
; pbsmInfo : BSMINFO* optional, 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。

; INT BroadcastSystemMessageExW(BROADCAST_SYSTEM_MESSAGE_FLAGS flags, BROADCAST_SYSTEM_MESSAGE_INFO* lpInfo, DWORD Msg, WPARAM wParam, LPARAM lParam, BSMINFO* pbsmInfo)
#uselib "USER32.dll"
#cfunc global BroadcastSystemMessageExW "BroadcastSystemMessageExW" int, int, int, intptr, intptr, var
; res = BroadcastSystemMessageExW(flags, lpInfo, Msg, wParam, lParam, pbsmInfo)
; flags : BROADCAST_SYSTEM_MESSAGE_FLAGS -> "int"
; lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out -> "int"
; Msg : DWORD -> "int"
; wParam : WPARAM -> "intptr"
; lParam : LPARAM -> "intptr"
; pbsmInfo : BSMINFO* optional, 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")
	procBroadcastSystemMessageExW = user32.NewProc("BroadcastSystemMessageExW")
)

// flags (BROADCAST_SYSTEM_MESSAGE_FLAGS), lpInfo (BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out), Msg (DWORD), wParam (WPARAM), lParam (LPARAM), pbsmInfo (BSMINFO* optional, out)
r1, _, err := procBroadcastSystemMessageExW.Call(
	uintptr(flags),
	uintptr(lpInfo),
	uintptr(Msg),
	uintptr(wParam),
	uintptr(lParam),
	uintptr(pbsmInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function BroadcastSystemMessageExW(
  flags: DWORD;   // BROADCAST_SYSTEM_MESSAGE_FLAGS
  lpInfo: Pointer;   // BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
  Msg: DWORD;   // DWORD
  wParam: NativeUInt;   // WPARAM
  lParam: NativeInt;   // LPARAM
  pbsmInfo: Pointer   // BSMINFO* optional, out
): Integer; stdcall;
  external 'USER32.dll' name 'BroadcastSystemMessageExW';

result := DllCall("USER32\BroadcastSystemMessageExW"
    , "UInt", flags   ; BROADCAST_SYSTEM_MESSAGE_FLAGS
    , "Ptr", lpInfo   ; BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out
    , "UInt", Msg   ; DWORD
    , "UPtr", wParam   ; WPARAM
    , "Ptr", lParam   ; LPARAM
    , "Ptr", pbsmInfo   ; BSMINFO* optional, out
    , "Int")   ; return: INT

●BroadcastSystemMessageExW(flags, lpInfo, Msg, wParam, lParam, pbsmInfo) = DLL("USER32.dll", "int BroadcastSystemMessageExW(dword, void*, dword, int, int, void*)")
# 呼び出し: BroadcastSystemMessageExW(flags, lpInfo, Msg, wParam, lParam, pbsmInfo)
# flags : BROADCAST_SYSTEM_MESSAGE_FLAGS -> "dword"
# lpInfo : BROADCAST_SYSTEM_MESSAGE_INFO* optional, in/out -> "void*"
# Msg : DWORD -> "dword"
# wParam : WPARAM -> "int"
# lParam : LPARAM -> "int"
# pbsmInfo : BSMINFO* optional, out -> "void*"
# 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。