SLGenerateOfflineInstallationId

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

HRESULT SLGenerateOfflineInstallationId(
    void* hSLC,
    const GUID* pProductSkuId,
    LPWSTR* ppwszInstallationId
);

<DllImport("SLC.dll", ExactSpelling:=True)>
Public Shared Function SLGenerateOfflineInstallationId(
    hSLC As IntPtr,   ' void*
    ByRef pProductSkuId As Guid,   ' GUID*
    ppwszInstallationId As IntPtr   ' LPWSTR* out
) As Integer
End Function

' hSLC : void*
' pProductSkuId : GUID*
' ppwszInstallationId : LPWSTR* out
Declare PtrSafe Function SLGenerateOfflineInstallationId Lib "slc" ( _
    ByVal hSLC As LongPtr, _
    ByVal pProductSkuId As LongPtr, _
    ByVal ppwszInstallationId 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

SLGenerateOfflineInstallationId = ctypes.windll.slc.SLGenerateOfflineInstallationId
SLGenerateOfflineInstallationId.restype = ctypes.c_int
SLGenerateOfflineInstallationId.argtypes = [
    ctypes.POINTER(None),  # hSLC : void*
    ctypes.c_void_p,  # pProductSkuId : GUID*
    ctypes.c_void_p,  # ppwszInstallationId : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SLC.dll')
SLGenerateOfflineInstallationId = Fiddle::Function.new(
  lib['SLGenerateOfflineInstallationId'],
  [
    Fiddle::TYPE_VOIDP,  # hSLC : void*
    Fiddle::TYPE_VOIDP,  # pProductSkuId : GUID*
    Fiddle::TYPE_VOIDP,  # ppwszInstallationId : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "slc")]
extern "system" {
    fn SLGenerateOfflineInstallationId(
        hSLC: *mut (),  // void*
        pProductSkuId: *const GUID,  // GUID*
        ppwszInstallationId: *mut *mut u16  // LPWSTR* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "SLC.dll"
#func global SLGenerateOfflineInstallationId "SLGenerateOfflineInstallationId" sptr, sptr, sptr
; SLGenerateOfflineInstallationId hSLC, varptr(pProductSkuId), varptr(ppwszInstallationId)   ; 戻り値は stat
; hSLC : void* -> "sptr"
; pProductSkuId : GUID* -> "sptr"
; ppwszInstallationId : LPWSTR* 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 SLGenerateOfflineInstallationId "SLGenerateOfflineInstallationId" sptr, var, var
; res = SLGenerateOfflineInstallationId(hSLC, pProductSkuId, ppwszInstallationId)
; hSLC : void* -> "sptr"
; pProductSkuId : GUID* -> "var"
; ppwszInstallationId : LPWSTR* 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 SLGenerateOfflineInstallationId(void* hSLC, GUID* pProductSkuId, LPWSTR* ppwszInstallationId)
#uselib "SLC.dll"
#cfunc global SLGenerateOfflineInstallationId "SLGenerateOfflineInstallationId" intptr, var, var
; res = SLGenerateOfflineInstallationId(hSLC, pProductSkuId, ppwszInstallationId)
; hSLC : void* -> "intptr"
; pProductSkuId : GUID* -> "var"
; ppwszInstallationId : LPWSTR* 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")
	procSLGenerateOfflineInstallationId = slc.NewProc("SLGenerateOfflineInstallationId")
)

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

function SLGenerateOfflineInstallationId(
  hSLC: Pointer;   // void*
  pProductSkuId: PGUID;   // GUID*
  ppwszInstallationId: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'SLC.dll' name 'SLGenerateOfflineInstallationId';

result := DllCall("SLC\SLGenerateOfflineInstallationId"
    , "Ptr", hSLC   ; void*
    , "Ptr", pProductSkuId   ; GUID*
    , "Ptr", ppwszInstallationId   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●SLGenerateOfflineInstallationId(hSLC, pProductSkuId, ppwszInstallationId) = DLL("SLC.dll", "int SLGenerateOfflineInstallationId(void*, void*, void*)")
# 呼び出し: SLGenerateOfflineInstallationId(hSLC, pProductSkuId, ppwszInstallationId)
# hSLC : void* -> "void*"
# pProductSkuId : GUID* -> "void*"
# ppwszInstallationId : LPWSTR* 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)。