SetSystemTimeAdjustment

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

BOOL SetSystemTimeAdjustment(
    DWORD dwTimeAdjustment,
    BOOL bTimeAdjustmentDisabled
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetSystemTimeAdjustment(
    dwTimeAdjustment As UInteger,   ' DWORD
    bTimeAdjustmentDisabled As Boolean   ' BOOL
) As Boolean
End Function

' dwTimeAdjustment : DWORD
' bTimeAdjustmentDisabled : BOOL
Declare PtrSafe Function SetSystemTimeAdjustment Lib "kernel32" ( _
    ByVal dwTimeAdjustment As Long, _
    ByVal bTimeAdjustmentDisabled As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetSystemTimeAdjustment = ctypes.windll.kernel32.SetSystemTimeAdjustment
SetSystemTimeAdjustment.restype = wintypes.BOOL
SetSystemTimeAdjustment.argtypes = [
    wintypes.DWORD,  # dwTimeAdjustment : DWORD
    wintypes.BOOL,  # bTimeAdjustmentDisabled : BOOL
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetSystemTimeAdjustment = Fiddle::Function.new(
  lib['SetSystemTimeAdjustment'],
  [
    -Fiddle::TYPE_INT,  # dwTimeAdjustment : DWORD
    Fiddle::TYPE_INT,  # bTimeAdjustmentDisabled : BOOL
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetSystemTimeAdjustment(
        dwTimeAdjustment: u32,  // DWORD
        bTimeAdjustmentDisabled: i32  // BOOL
    ) -> 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 SetSystemTimeAdjustment(uint dwTimeAdjustment, bool bTimeAdjustmentDisabled);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetSystemTimeAdjustment' -Namespace Win32 -PassThru
# $api::SetSystemTimeAdjustment(dwTimeAdjustment, bTimeAdjustmentDisabled)

#uselib "KERNEL32.dll"
#func global SetSystemTimeAdjustment "SetSystemTimeAdjustment" sptr, sptr
; SetSystemTimeAdjustment dwTimeAdjustment, bTimeAdjustmentDisabled   ; 戻り値は stat
; dwTimeAdjustment : DWORD -> "sptr"
; bTimeAdjustmentDisabled : BOOL -> "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 SetSystemTimeAdjustment "SetSystemTimeAdjustment" int, int
; res = SetSystemTimeAdjustment(dwTimeAdjustment, bTimeAdjustmentDisabled)
; dwTimeAdjustment : DWORD -> "int"
; bTimeAdjustmentDisabled : BOOL -> "int"

; BOOL SetSystemTimeAdjustment(DWORD dwTimeAdjustment, BOOL bTimeAdjustmentDisabled)
#uselib "KERNEL32.dll"
#cfunc global SetSystemTimeAdjustment "SetSystemTimeAdjustment" int, int
; res = SetSystemTimeAdjustment(dwTimeAdjustment, bTimeAdjustmentDisabled)
; dwTimeAdjustment : DWORD -> "int"
; bTimeAdjustmentDisabled : BOOL -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetSystemTimeAdjustment = kernel32.NewProc("SetSystemTimeAdjustment")
)

// dwTimeAdjustment (DWORD), bTimeAdjustmentDisabled (BOOL)
r1, _, err := procSetSystemTimeAdjustment.Call(
	uintptr(dwTimeAdjustment),
	uintptr(bTimeAdjustmentDisabled),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetSystemTimeAdjustment(
  dwTimeAdjustment: DWORD;   // DWORD
  bTimeAdjustmentDisabled: BOOL   // BOOL
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetSystemTimeAdjustment';

result := DllCall("KERNEL32\SetSystemTimeAdjustment"
    , "UInt", dwTimeAdjustment   ; DWORD
    , "Int", bTimeAdjustmentDisabled   ; BOOL
    , "Int")   ; return: BOOL

●SetSystemTimeAdjustment(dwTimeAdjustment, bTimeAdjustmentDisabled) = DLL("KERNEL32.dll", "bool SetSystemTimeAdjustment(dword, bool)")
# 呼び出し: SetSystemTimeAdjustment(dwTimeAdjustment, bTimeAdjustmentDisabled)
# dwTimeAdjustment : DWORD -> "dword"
# bTimeAdjustmentDisabled : BOOL -> "bool"
# 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)。