PowerReadPossibleFriendlyName

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

WIN32_ERROR PowerReadPossibleFriendlyName(
    HKEY RootPowerKey,   // optional
    const GUID* SubGroupOfPowerSettingsGuid,   // optional
    const GUID* PowerSettingGuid,   // optional
    DWORD PossibleSettingIndex,
    BYTE* Buffer,   // optional
    DWORD* BufferSize
);

<DllImport("POWRPROF.dll", ExactSpelling:=True)>
Public Shared Function PowerReadPossibleFriendlyName(
    RootPowerKey As IntPtr,   ' HKEY optional
    SubGroupOfPowerSettingsGuid As IntPtr,   ' GUID* optional
    PowerSettingGuid As IntPtr,   ' GUID* optional
    PossibleSettingIndex As UInteger,   ' DWORD
    Buffer As IntPtr,   ' BYTE* optional, out
    ByRef BufferSize As UInteger   ' DWORD* in/out
) As UInteger
End Function

' RootPowerKey : HKEY optional
' SubGroupOfPowerSettingsGuid : GUID* optional
' PowerSettingGuid : GUID* optional
' PossibleSettingIndex : DWORD
' Buffer : BYTE* optional, out
' BufferSize : DWORD* in/out
Declare PtrSafe Function PowerReadPossibleFriendlyName Lib "powrprof" ( _
    ByVal RootPowerKey As LongPtr, _
    ByVal SubGroupOfPowerSettingsGuid As LongPtr, _
    ByVal PowerSettingGuid As LongPtr, _
    ByVal PossibleSettingIndex As Long, _
    ByVal Buffer As LongPtr, _
    ByRef BufferSize 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

PowerReadPossibleFriendlyName = ctypes.windll.powrprof.PowerReadPossibleFriendlyName
PowerReadPossibleFriendlyName.restype = wintypes.DWORD
PowerReadPossibleFriendlyName.argtypes = [
    wintypes.HANDLE,  # RootPowerKey : HKEY optional
    ctypes.c_void_p,  # SubGroupOfPowerSettingsGuid : GUID* optional
    ctypes.c_void_p,  # PowerSettingGuid : GUID* optional
    wintypes.DWORD,  # PossibleSettingIndex : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # Buffer : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # BufferSize : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('POWRPROF.dll')
PowerReadPossibleFriendlyName = Fiddle::Function.new(
  lib['PowerReadPossibleFriendlyName'],
  [
    Fiddle::TYPE_VOIDP,  # RootPowerKey : HKEY optional
    Fiddle::TYPE_VOIDP,  # SubGroupOfPowerSettingsGuid : GUID* optional
    Fiddle::TYPE_VOIDP,  # PowerSettingGuid : GUID* optional
    -Fiddle::TYPE_INT,  # PossibleSettingIndex : DWORD
    Fiddle::TYPE_VOIDP,  # Buffer : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # BufferSize : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "powrprof")]
extern "system" {
    fn PowerReadPossibleFriendlyName(
        RootPowerKey: *mut core::ffi::c_void,  // HKEY optional
        SubGroupOfPowerSettingsGuid: *const GUID,  // GUID* optional
        PowerSettingGuid: *const GUID,  // GUID* optional
        PossibleSettingIndex: u32,  // DWORD
        Buffer: *mut u8,  // BYTE* optional, out
        BufferSize: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("POWRPROF.dll")]
public static extern uint PowerReadPossibleFriendlyName(IntPtr RootPowerKey, IntPtr SubGroupOfPowerSettingsGuid, IntPtr PowerSettingGuid, uint PossibleSettingIndex, IntPtr Buffer, ref uint BufferSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'POWRPROF_PowerReadPossibleFriendlyName' -Namespace Win32 -PassThru
# $api::PowerReadPossibleFriendlyName(RootPowerKey, SubGroupOfPowerSettingsGuid, PowerSettingGuid, PossibleSettingIndex, Buffer, BufferSize)

#uselib "POWRPROF.dll"
#func global PowerReadPossibleFriendlyName "PowerReadPossibleFriendlyName" sptr, sptr, sptr, sptr, sptr, sptr
; PowerReadPossibleFriendlyName RootPowerKey, varptr(SubGroupOfPowerSettingsGuid), varptr(PowerSettingGuid), PossibleSettingIndex, varptr(Buffer), varptr(BufferSize)   ; 戻り値は stat
; RootPowerKey : HKEY optional -> "sptr"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "sptr"
; PowerSettingGuid : GUID* optional -> "sptr"
; PossibleSettingIndex : DWORD -> "sptr"
; Buffer : BYTE* optional, out -> "sptr"
; BufferSize : DWORD* in/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 "POWRPROF.dll"
#cfunc global PowerReadPossibleFriendlyName "PowerReadPossibleFriendlyName" sptr, var, var, int, var, var
; res = PowerReadPossibleFriendlyName(RootPowerKey, SubGroupOfPowerSettingsGuid, PowerSettingGuid, PossibleSettingIndex, Buffer, BufferSize)
; RootPowerKey : HKEY optional -> "sptr"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "var"
; PowerSettingGuid : GUID* optional -> "var"
; PossibleSettingIndex : DWORD -> "int"
; Buffer : BYTE* optional, out -> "var"
; BufferSize : DWORD* in/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。

; WIN32_ERROR PowerReadPossibleFriendlyName(HKEY RootPowerKey, GUID* SubGroupOfPowerSettingsGuid, GUID* PowerSettingGuid, DWORD PossibleSettingIndex, BYTE* Buffer, DWORD* BufferSize)
#uselib "POWRPROF.dll"
#cfunc global PowerReadPossibleFriendlyName "PowerReadPossibleFriendlyName" intptr, var, var, int, var, var
; res = PowerReadPossibleFriendlyName(RootPowerKey, SubGroupOfPowerSettingsGuid, PowerSettingGuid, PossibleSettingIndex, Buffer, BufferSize)
; RootPowerKey : HKEY optional -> "intptr"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "var"
; PowerSettingGuid : GUID* optional -> "var"
; PossibleSettingIndex : DWORD -> "int"
; Buffer : BYTE* optional, out -> "var"
; BufferSize : DWORD* in/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 (
	powrprof = windows.NewLazySystemDLL("POWRPROF.dll")
	procPowerReadPossibleFriendlyName = powrprof.NewProc("PowerReadPossibleFriendlyName")
)

// RootPowerKey (HKEY optional), SubGroupOfPowerSettingsGuid (GUID* optional), PowerSettingGuid (GUID* optional), PossibleSettingIndex (DWORD), Buffer (BYTE* optional, out), BufferSize (DWORD* in/out)
r1, _, err := procPowerReadPossibleFriendlyName.Call(
	uintptr(RootPowerKey),
	uintptr(SubGroupOfPowerSettingsGuid),
	uintptr(PowerSettingGuid),
	uintptr(PossibleSettingIndex),
	uintptr(Buffer),
	uintptr(BufferSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function PowerReadPossibleFriendlyName(
  RootPowerKey: THandle;   // HKEY optional
  SubGroupOfPowerSettingsGuid: PGUID;   // GUID* optional
  PowerSettingGuid: PGUID;   // GUID* optional
  PossibleSettingIndex: DWORD;   // DWORD
  Buffer: Pointer;   // BYTE* optional, out
  BufferSize: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'POWRPROF.dll' name 'PowerReadPossibleFriendlyName';

result := DllCall("POWRPROF\PowerReadPossibleFriendlyName"
    , "Ptr", RootPowerKey   ; HKEY optional
    , "Ptr", SubGroupOfPowerSettingsGuid   ; GUID* optional
    , "Ptr", PowerSettingGuid   ; GUID* optional
    , "UInt", PossibleSettingIndex   ; DWORD
    , "Ptr", Buffer   ; BYTE* optional, out
    , "Ptr", BufferSize   ; DWORD* in/out
    , "UInt")   ; return: WIN32_ERROR

●PowerReadPossibleFriendlyName(RootPowerKey, SubGroupOfPowerSettingsGuid, PowerSettingGuid, PossibleSettingIndex, Buffer, BufferSize) = DLL("POWRPROF.dll", "dword PowerReadPossibleFriendlyName(void*, void*, void*, dword, void*, void*)")
# 呼び出し: PowerReadPossibleFriendlyName(RootPowerKey, SubGroupOfPowerSettingsGuid, PowerSettingGuid, PossibleSettingIndex, Buffer, BufferSize)
# RootPowerKey : HKEY optional -> "void*"
# SubGroupOfPowerSettingsGuid : GUID* optional -> "void*"
# PowerSettingGuid : GUID* optional -> "void*"
# PossibleSettingIndex : DWORD -> "dword"
# Buffer : BYTE* optional, out -> "void*"
# BufferSize : DWORD* in/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)。