AssocCreate

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

HRESULT AssocCreate(
    GUID clsid,
    const GUID* riid,
    void** ppv
);

<DllImport("SHLWAPI.dll", ExactSpelling:=True)>
Public Shared Function AssocCreate(
    clsid As Guid,   ' GUID
    ByRef riid As Guid,   ' GUID*
    ppv As IntPtr   ' void** out
) As Integer
End Function

' clsid : GUID
' riid : GUID*
' ppv : void** out
Declare PtrSafe Function AssocCreate Lib "shlwapi" ( _
    ByVal clsid As LongPtr, _
    ByVal riid As LongPtr, _
    ByVal ppv 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

AssocCreate = ctypes.windll.shlwapi.AssocCreate
AssocCreate.restype = ctypes.c_int
AssocCreate.argtypes = [
    ctypes.c_void_p,  # clsid : GUID
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppv : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
AssocCreate = Fiddle::Function.new(
  lib['AssocCreate'],
  [
    Fiddle::TYPE_VOIDP,  # clsid : GUID
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppv : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shlwapi")]
extern "system" {
    fn AssocCreate(
        clsid: GUID,  // GUID
        riid: *const GUID,  // GUID*
        ppv: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll")]
public static extern int AssocCreate(Guid clsid, ref Guid riid, IntPtr ppv);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_AssocCreate' -Namespace Win32 -PassThru
# $api::AssocCreate(clsid, riid, ppv)

#uselib "SHLWAPI.dll"
#func global AssocCreate "AssocCreate" sptr, sptr, sptr
; AssocCreate clsid, varptr(riid), ppv   ; 戻り値は stat
; clsid : GUID -> "sptr"
; riid : GUID* -> "sptr"
; ppv : void** out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 "SHLWAPI.dll"
#cfunc global AssocCreate "AssocCreate" int, var, sptr
; res = AssocCreate(clsid, riid, ppv)
; clsid : GUID -> "int"
; riid : GUID* -> "var"
; ppv : void** out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 AssocCreate(GUID clsid, GUID* riid, void** ppv)
#uselib "SHLWAPI.dll"
#cfunc global AssocCreate "AssocCreate" int, var, intptr
; res = AssocCreate(clsid, riid, ppv)
; clsid : GUID -> "int"
; riid : GUID* -> "var"
; ppv : void** out -> "intptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procAssocCreate = shlwapi.NewProc("AssocCreate")
)

// clsid (GUID), riid (GUID*), ppv (void** out)
r1, _, err := procAssocCreate.Call(
	uintptr(clsid),
	uintptr(riid),
	uintptr(ppv),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AssocCreate(
  clsid: TGUID;   // GUID
  riid: PGUID;   // GUID*
  ppv: Pointer   // void** out
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'AssocCreate';

result := DllCall("SHLWAPI\AssocCreate"
    , "Ptr", clsid   ; GUID
    , "Ptr", riid   ; GUID*
    , "Ptr", ppv   ; void** out
    , "Int")   ; return: HRESULT

●AssocCreate(clsid, riid, ppv) = DLL("SHLWAPI.dll", "int AssocCreate(void*, void*, void*)")
# 呼び出し: AssocCreate(clsid, riid, ppv)
# clsid : GUID -> "void*"
# riid : GUID* -> "void*"
# ppv : void** 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)。