SLGetInstalledProductKeyIds

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

HRESULT SLGetInstalledProductKeyIds(
    void* hSLC,
    const GUID* pProductSkuId,
    DWORD* pnProductKeyIds,
    GUID** ppProductKeyIds
);

<DllImport("SLC.dll", ExactSpelling:=True)>
Public Shared Function SLGetInstalledProductKeyIds(
    hSLC As IntPtr,   ' void*
    ByRef pProductSkuId As Guid,   ' GUID*
    <Out> ByRef pnProductKeyIds As UInteger,   ' DWORD* out
    ppProductKeyIds As IntPtr   ' GUID** out
) As Integer
End Function

' hSLC : void*
' pProductSkuId : GUID*
' pnProductKeyIds : DWORD* out
' ppProductKeyIds : GUID** out
Declare PtrSafe Function SLGetInstalledProductKeyIds Lib "slc" ( _
    ByVal hSLC As LongPtr, _
    ByVal pProductSkuId As LongPtr, _
    ByRef pnProductKeyIds As Long, _
    ByVal ppProductKeyIds 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

SLGetInstalledProductKeyIds = ctypes.windll.slc.SLGetInstalledProductKeyIds
SLGetInstalledProductKeyIds.restype = ctypes.c_int
SLGetInstalledProductKeyIds.argtypes = [
    ctypes.POINTER(None),  # hSLC : void*
    ctypes.c_void_p,  # pProductSkuId : GUID*
    ctypes.POINTER(wintypes.DWORD),  # pnProductKeyIds : DWORD* out
    ctypes.c_void_p,  # ppProductKeyIds : GUID** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SLC.dll')
SLGetInstalledProductKeyIds = Fiddle::Function.new(
  lib['SLGetInstalledProductKeyIds'],
  [
    Fiddle::TYPE_VOIDP,  # hSLC : void*
    Fiddle::TYPE_VOIDP,  # pProductSkuId : GUID*
    Fiddle::TYPE_VOIDP,  # pnProductKeyIds : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppProductKeyIds : GUID** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "slc")]
extern "system" {
    fn SLGetInstalledProductKeyIds(
        hSLC: *mut (),  // void*
        pProductSkuId: *const GUID,  // GUID*
        pnProductKeyIds: *mut u32,  // DWORD* out
        ppProductKeyIds: *mut *mut GUID  // GUID** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SLC.dll")]
public static extern int SLGetInstalledProductKeyIds(IntPtr hSLC, ref Guid pProductSkuId, out uint pnProductKeyIds, IntPtr ppProductKeyIds);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SLC_SLGetInstalledProductKeyIds' -Namespace Win32 -PassThru
# $api::SLGetInstalledProductKeyIds(hSLC, pProductSkuId, pnProductKeyIds, ppProductKeyIds)

#uselib "SLC.dll"
#func global SLGetInstalledProductKeyIds "SLGetInstalledProductKeyIds" sptr, sptr, sptr, sptr
; SLGetInstalledProductKeyIds hSLC, varptr(pProductSkuId), varptr(pnProductKeyIds), varptr(ppProductKeyIds)   ; 戻り値は stat
; hSLC : void* -> "sptr"
; pProductSkuId : GUID* -> "sptr"
; pnProductKeyIds : DWORD* out -> "sptr"
; ppProductKeyIds : GUID** 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 "SLC.dll"
#cfunc global SLGetInstalledProductKeyIds "SLGetInstalledProductKeyIds" sptr, var, var, var
; res = SLGetInstalledProductKeyIds(hSLC, pProductSkuId, pnProductKeyIds, ppProductKeyIds)
; hSLC : void* -> "sptr"
; pProductSkuId : GUID* -> "var"
; pnProductKeyIds : DWORD* out -> "var"
; ppProductKeyIds : GUID** 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。

; HRESULT SLGetInstalledProductKeyIds(void* hSLC, GUID* pProductSkuId, DWORD* pnProductKeyIds, GUID** ppProductKeyIds)
#uselib "SLC.dll"
#cfunc global SLGetInstalledProductKeyIds "SLGetInstalledProductKeyIds" intptr, var, var, var
; res = SLGetInstalledProductKeyIds(hSLC, pProductSkuId, pnProductKeyIds, ppProductKeyIds)
; hSLC : void* -> "intptr"
; pProductSkuId : GUID* -> "var"
; pnProductKeyIds : DWORD* out -> "var"
; ppProductKeyIds : GUID** 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 (
	slc = windows.NewLazySystemDLL("SLC.dll")
	procSLGetInstalledProductKeyIds = slc.NewProc("SLGetInstalledProductKeyIds")
)

// hSLC (void*), pProductSkuId (GUID*), pnProductKeyIds (DWORD* out), ppProductKeyIds (GUID** out)
r1, _, err := procSLGetInstalledProductKeyIds.Call(
	uintptr(hSLC),
	uintptr(pProductSkuId),
	uintptr(pnProductKeyIds),
	uintptr(ppProductKeyIds),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SLGetInstalledProductKeyIds(
  hSLC: Pointer;   // void*
  pProductSkuId: PGUID;   // GUID*
  pnProductKeyIds: Pointer;   // DWORD* out
  ppProductKeyIds: PGUID   // GUID** out
): Integer; stdcall;
  external 'SLC.dll' name 'SLGetInstalledProductKeyIds';

result := DllCall("SLC\SLGetInstalledProductKeyIds"
    , "Ptr", hSLC   ; void*
    , "Ptr", pProductSkuId   ; GUID*
    , "Ptr", pnProductKeyIds   ; DWORD* out
    , "Ptr", ppProductKeyIds   ; GUID** out
    , "Int")   ; return: HRESULT

●SLGetInstalledProductKeyIds(hSLC, pProductSkuId, pnProductKeyIds, ppProductKeyIds) = DLL("SLC.dll", "int SLGetInstalledProductKeyIds(void*, void*, void*, void*)")
# 呼び出し: SLGetInstalledProductKeyIds(hSLC, pProductSkuId, pnProductKeyIds, ppProductKeyIds)
# hSLC : void* -> "void*"
# pProductSkuId : GUID* -> "void*"
# pnProductKeyIds : DWORD* out -> "void*"
# ppProductKeyIds : GUID** 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)。