SystemTimeToTzSpecificLocalTime

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

BOOL SystemTimeToTzSpecificLocalTime(
    const TIME_ZONE_INFORMATION* lpTimeZoneInformation,   // optional
    const SYSTEMTIME* lpUniversalTime,
    SYSTEMTIME* lpLocalTime
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SystemTimeToTzSpecificLocalTime(
    lpTimeZoneInformation As IntPtr,   ' TIME_ZONE_INFORMATION* optional
    lpUniversalTime As IntPtr,   ' SYSTEMTIME*
    lpLocalTime As IntPtr   ' SYSTEMTIME* out
) As Boolean
End Function

' lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional
' lpUniversalTime : SYSTEMTIME*
' lpLocalTime : SYSTEMTIME* out
Declare PtrSafe Function SystemTimeToTzSpecificLocalTime Lib "kernel32" ( _
    ByVal lpTimeZoneInformation As LongPtr, _
    ByVal lpUniversalTime As LongPtr, _
    ByVal lpLocalTime 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

SystemTimeToTzSpecificLocalTime = ctypes.windll.kernel32.SystemTimeToTzSpecificLocalTime
SystemTimeToTzSpecificLocalTime.restype = wintypes.BOOL
SystemTimeToTzSpecificLocalTime.argtypes = [
    ctypes.c_void_p,  # lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional
    ctypes.c_void_p,  # lpUniversalTime : SYSTEMTIME*
    ctypes.c_void_p,  # lpLocalTime : SYSTEMTIME* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SystemTimeToTzSpecificLocalTime = Fiddle::Function.new(
  lib['SystemTimeToTzSpecificLocalTime'],
  [
    Fiddle::TYPE_VOIDP,  # lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional
    Fiddle::TYPE_VOIDP,  # lpUniversalTime : SYSTEMTIME*
    Fiddle::TYPE_VOIDP,  # lpLocalTime : SYSTEMTIME* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SystemTimeToTzSpecificLocalTime(
        lpTimeZoneInformation: *const TIME_ZONE_INFORMATION,  // TIME_ZONE_INFORMATION* optional
        lpUniversalTime: *const SYSTEMTIME,  // SYSTEMTIME*
        lpLocalTime: *mut SYSTEMTIME  // SYSTEMTIME* out
    ) -> 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 SystemTimeToTzSpecificLocalTime(IntPtr lpTimeZoneInformation, IntPtr lpUniversalTime, IntPtr lpLocalTime);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SystemTimeToTzSpecificLocalTime' -Namespace Win32 -PassThru
# $api::SystemTimeToTzSpecificLocalTime(lpTimeZoneInformation, lpUniversalTime, lpLocalTime)

#uselib "KERNEL32.dll"
#func global SystemTimeToTzSpecificLocalTime "SystemTimeToTzSpecificLocalTime" sptr, sptr, sptr
; SystemTimeToTzSpecificLocalTime varptr(lpTimeZoneInformation), varptr(lpUniversalTime), varptr(lpLocalTime)   ; 戻り値は stat
; lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional -> "sptr"
; lpUniversalTime : SYSTEMTIME* -> "sptr"
; lpLocalTime : SYSTEMTIME* out -> "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 SystemTimeToTzSpecificLocalTime "SystemTimeToTzSpecificLocalTime" var, var, var
; res = SystemTimeToTzSpecificLocalTime(lpTimeZoneInformation, lpUniversalTime, lpLocalTime)
; lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional -> "var"
; lpUniversalTime : SYSTEMTIME* -> "var"
; lpLocalTime : SYSTEMTIME* 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 SystemTimeToTzSpecificLocalTime(TIME_ZONE_INFORMATION* lpTimeZoneInformation, SYSTEMTIME* lpUniversalTime, SYSTEMTIME* lpLocalTime)
#uselib "KERNEL32.dll"
#cfunc global SystemTimeToTzSpecificLocalTime "SystemTimeToTzSpecificLocalTime" var, var, var
; res = SystemTimeToTzSpecificLocalTime(lpTimeZoneInformation, lpUniversalTime, lpLocalTime)
; lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional -> "var"
; lpUniversalTime : SYSTEMTIME* -> "var"
; lpLocalTime : SYSTEMTIME* 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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSystemTimeToTzSpecificLocalTime = kernel32.NewProc("SystemTimeToTzSpecificLocalTime")
)

// lpTimeZoneInformation (TIME_ZONE_INFORMATION* optional), lpUniversalTime (SYSTEMTIME*), lpLocalTime (SYSTEMTIME* out)
r1, _, err := procSystemTimeToTzSpecificLocalTime.Call(
	uintptr(lpTimeZoneInformation),
	uintptr(lpUniversalTime),
	uintptr(lpLocalTime),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SystemTimeToTzSpecificLocalTime(
  lpTimeZoneInformation: Pointer;   // TIME_ZONE_INFORMATION* optional
  lpUniversalTime: Pointer;   // SYSTEMTIME*
  lpLocalTime: Pointer   // SYSTEMTIME* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SystemTimeToTzSpecificLocalTime';

result := DllCall("KERNEL32\SystemTimeToTzSpecificLocalTime"
    , "Ptr", lpTimeZoneInformation   ; TIME_ZONE_INFORMATION* optional
    , "Ptr", lpUniversalTime   ; SYSTEMTIME*
    , "Ptr", lpLocalTime   ; SYSTEMTIME* out
    , "Int")   ; return: BOOL

●SystemTimeToTzSpecificLocalTime(lpTimeZoneInformation, lpUniversalTime, lpLocalTime) = DLL("KERNEL32.dll", "bool SystemTimeToTzSpecificLocalTime(void*, void*, void*)")
# 呼び出し: SystemTimeToTzSpecificLocalTime(lpTimeZoneInformation, lpUniversalTime, lpLocalTime)
# lpTimeZoneInformation : TIME_ZONE_INFORMATION* optional -> "void*"
# lpUniversalTime : SYSTEMTIME* -> "void*"
# lpLocalTime : SYSTEMTIME* 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)。