PowerWriteDCDefaultIndex

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

DWORD PowerWriteDCDefaultIndex(
    HKEY RootSystemPowerKey,   // optional
    const GUID* SchemePersonalityGuid,
    const GUID* SubGroupOfPowerSettingsGuid,   // optional
    const GUID* PowerSettingGuid,
    DWORD DefaultDcIndex
);

<DllImport("POWRPROF.dll", ExactSpelling:=True)>
Public Shared Function PowerWriteDCDefaultIndex(
    RootSystemPowerKey As IntPtr,   ' HKEY optional
    ByRef SchemePersonalityGuid As Guid,   ' GUID*
    SubGroupOfPowerSettingsGuid As IntPtr,   ' GUID* optional
    ByRef PowerSettingGuid As Guid,   ' GUID*
    DefaultDcIndex As UInteger   ' DWORD
) As UInteger
End Function

' RootSystemPowerKey : HKEY optional
' SchemePersonalityGuid : GUID*
' SubGroupOfPowerSettingsGuid : GUID* optional
' PowerSettingGuid : GUID*
' DefaultDcIndex : DWORD
Declare PtrSafe Function PowerWriteDCDefaultIndex Lib "powrprof" ( _
    ByVal RootSystemPowerKey As LongPtr, _
    ByVal SchemePersonalityGuid As LongPtr, _
    ByVal SubGroupOfPowerSettingsGuid As LongPtr, _
    ByVal PowerSettingGuid As LongPtr, _
    ByVal DefaultDcIndex 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

PowerWriteDCDefaultIndex = ctypes.windll.powrprof.PowerWriteDCDefaultIndex
PowerWriteDCDefaultIndex.restype = wintypes.DWORD
PowerWriteDCDefaultIndex.argtypes = [
    wintypes.HANDLE,  # RootSystemPowerKey : HKEY optional
    ctypes.c_void_p,  # SchemePersonalityGuid : GUID*
    ctypes.c_void_p,  # SubGroupOfPowerSettingsGuid : GUID* optional
    ctypes.c_void_p,  # PowerSettingGuid : GUID*
    wintypes.DWORD,  # DefaultDcIndex : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('POWRPROF.dll')
PowerWriteDCDefaultIndex = Fiddle::Function.new(
  lib['PowerWriteDCDefaultIndex'],
  [
    Fiddle::TYPE_VOIDP,  # RootSystemPowerKey : HKEY optional
    Fiddle::TYPE_VOIDP,  # SchemePersonalityGuid : GUID*
    Fiddle::TYPE_VOIDP,  # SubGroupOfPowerSettingsGuid : GUID* optional
    Fiddle::TYPE_VOIDP,  # PowerSettingGuid : GUID*
    -Fiddle::TYPE_INT,  # DefaultDcIndex : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "powrprof")]
extern "system" {
    fn PowerWriteDCDefaultIndex(
        RootSystemPowerKey: *mut core::ffi::c_void,  // HKEY optional
        SchemePersonalityGuid: *const GUID,  // GUID*
        SubGroupOfPowerSettingsGuid: *const GUID,  // GUID* optional
        PowerSettingGuid: *const GUID,  // GUID*
        DefaultDcIndex: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("POWRPROF.dll")]
public static extern uint PowerWriteDCDefaultIndex(IntPtr RootSystemPowerKey, ref Guid SchemePersonalityGuid, IntPtr SubGroupOfPowerSettingsGuid, ref Guid PowerSettingGuid, uint DefaultDcIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'POWRPROF_PowerWriteDCDefaultIndex' -Namespace Win32 -PassThru
# $api::PowerWriteDCDefaultIndex(RootSystemPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DefaultDcIndex)

#uselib "POWRPROF.dll"
#func global PowerWriteDCDefaultIndex "PowerWriteDCDefaultIndex" sptr, sptr, sptr, sptr, sptr
; PowerWriteDCDefaultIndex RootSystemPowerKey, varptr(SchemePersonalityGuid), varptr(SubGroupOfPowerSettingsGuid), varptr(PowerSettingGuid), DefaultDcIndex   ; 戻り値は stat
; RootSystemPowerKey : HKEY optional -> "sptr"
; SchemePersonalityGuid : GUID* -> "sptr"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "sptr"
; PowerSettingGuid : GUID* -> "sptr"
; DefaultDcIndex : DWORD -> "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 "POWRPROF.dll"
#cfunc global PowerWriteDCDefaultIndex "PowerWriteDCDefaultIndex" sptr, var, var, var, int
; res = PowerWriteDCDefaultIndex(RootSystemPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DefaultDcIndex)
; RootSystemPowerKey : HKEY optional -> "sptr"
; SchemePersonalityGuid : GUID* -> "var"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "var"
; PowerSettingGuid : GUID* -> "var"
; DefaultDcIndex : DWORD -> "int"
; ※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。

; DWORD PowerWriteDCDefaultIndex(HKEY RootSystemPowerKey, GUID* SchemePersonalityGuid, GUID* SubGroupOfPowerSettingsGuid, GUID* PowerSettingGuid, DWORD DefaultDcIndex)
#uselib "POWRPROF.dll"
#cfunc global PowerWriteDCDefaultIndex "PowerWriteDCDefaultIndex" intptr, var, var, var, int
; res = PowerWriteDCDefaultIndex(RootSystemPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DefaultDcIndex)
; RootSystemPowerKey : HKEY optional -> "intptr"
; SchemePersonalityGuid : GUID* -> "var"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "var"
; PowerSettingGuid : GUID* -> "var"
; DefaultDcIndex : DWORD -> "int"
; ※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 (
	powrprof = windows.NewLazySystemDLL("POWRPROF.dll")
	procPowerWriteDCDefaultIndex = powrprof.NewProc("PowerWriteDCDefaultIndex")
)

// RootSystemPowerKey (HKEY optional), SchemePersonalityGuid (GUID*), SubGroupOfPowerSettingsGuid (GUID* optional), PowerSettingGuid (GUID*), DefaultDcIndex (DWORD)
r1, _, err := procPowerWriteDCDefaultIndex.Call(
	uintptr(RootSystemPowerKey),
	uintptr(SchemePersonalityGuid),
	uintptr(SubGroupOfPowerSettingsGuid),
	uintptr(PowerSettingGuid),
	uintptr(DefaultDcIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PowerWriteDCDefaultIndex(
  RootSystemPowerKey: THandle;   // HKEY optional
  SchemePersonalityGuid: PGUID;   // GUID*
  SubGroupOfPowerSettingsGuid: PGUID;   // GUID* optional
  PowerSettingGuid: PGUID;   // GUID*
  DefaultDcIndex: DWORD   // DWORD
): DWORD; stdcall;
  external 'POWRPROF.dll' name 'PowerWriteDCDefaultIndex';

result := DllCall("POWRPROF\PowerWriteDCDefaultIndex"
    , "Ptr", RootSystemPowerKey   ; HKEY optional
    , "Ptr", SchemePersonalityGuid   ; GUID*
    , "Ptr", SubGroupOfPowerSettingsGuid   ; GUID* optional
    , "Ptr", PowerSettingGuid   ; GUID*
    , "UInt", DefaultDcIndex   ; DWORD
    , "UInt")   ; return: DWORD

●PowerWriteDCDefaultIndex(RootSystemPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DefaultDcIndex) = DLL("POWRPROF.dll", "dword PowerWriteDCDefaultIndex(void*, void*, void*, void*, dword)")
# 呼び出し: PowerWriteDCDefaultIndex(RootSystemPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DefaultDcIndex)
# RootSystemPowerKey : HKEY optional -> "void*"
# SchemePersonalityGuid : GUID* -> "void*"
# SubGroupOfPowerSettingsGuid : GUID* optional -> "void*"
# PowerSettingGuid : GUID* -> "void*"
# DefaultDcIndex : DWORD -> "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)。