AssocCreateForClasses

// SHELL32.dll
#include <windows.h>

HRESULT AssocCreateForClasses(
    const ASSOCIATIONELEMENT* rgClasses,
    DWORD cClasses,
    const GUID* riid,
    void** ppv
);

<DllImport("SHELL32.dll", ExactSpelling:=True)>
Public Shared Function AssocCreateForClasses(
    rgClasses As IntPtr,   ' ASSOCIATIONELEMENT*
    cClasses As UInteger,   ' DWORD
    ByRef riid As Guid,   ' GUID*
    ppv As IntPtr   ' void** out
) As Integer
End Function

' rgClasses : ASSOCIATIONELEMENT*
' cClasses : DWORD
' riid : GUID*
' ppv : void** out
Declare PtrSafe Function AssocCreateForClasses Lib "shell32" ( _
    ByVal rgClasses As LongPtr, _
    ByVal cClasses As Long, _
    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

AssocCreateForClasses = ctypes.windll.shell32.AssocCreateForClasses
AssocCreateForClasses.restype = ctypes.c_int
AssocCreateForClasses.argtypes = [
    ctypes.c_void_p,  # rgClasses : ASSOCIATIONELEMENT*
    wintypes.DWORD,  # cClasses : DWORD
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppv : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
AssocCreateForClasses = Fiddle::Function.new(
  lib['AssocCreateForClasses'],
  [
    Fiddle::TYPE_VOIDP,  # rgClasses : ASSOCIATIONELEMENT*
    -Fiddle::TYPE_INT,  # cClasses : DWORD
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppv : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn AssocCreateForClasses(
        rgClasses: *const ASSOCIATIONELEMENT,  // ASSOCIATIONELEMENT*
        cClasses: u32,  // DWORD
        riid: *const GUID,  // GUID*
        ppv: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll")]
public static extern int AssocCreateForClasses(IntPtr rgClasses, uint cClasses, ref Guid riid, IntPtr ppv);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_AssocCreateForClasses' -Namespace Win32 -PassThru
# $api::AssocCreateForClasses(rgClasses, cClasses, riid, ppv)

#uselib "SHELL32.dll"
#func global AssocCreateForClasses "AssocCreateForClasses" sptr, sptr, sptr, sptr
; AssocCreateForClasses varptr(rgClasses), cClasses, varptr(riid), ppv   ; 戻り値は stat
; rgClasses : ASSOCIATIONELEMENT* -> "sptr"
; cClasses : DWORD -> "sptr"
; riid : GUID* -> "sptr"
; ppv : void** 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 "SHELL32.dll"
#cfunc global AssocCreateForClasses "AssocCreateForClasses" var, int, var, sptr
; res = AssocCreateForClasses(rgClasses, cClasses, riid, ppv)
; rgClasses : ASSOCIATIONELEMENT* -> "var"
; cClasses : DWORD -> "int"
; riid : GUID* -> "var"
; ppv : void** out -> "sptr"
; ※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 AssocCreateForClasses(ASSOCIATIONELEMENT* rgClasses, DWORD cClasses, GUID* riid, void** ppv)
#uselib "SHELL32.dll"
#cfunc global AssocCreateForClasses "AssocCreateForClasses" var, int, var, intptr
; res = AssocCreateForClasses(rgClasses, cClasses, riid, ppv)
; rgClasses : ASSOCIATIONELEMENT* -> "var"
; cClasses : DWORD -> "int"
; riid : GUID* -> "var"
; ppv : void** out -> "intptr"
; ※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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procAssocCreateForClasses = shell32.NewProc("AssocCreateForClasses")
)

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

function AssocCreateForClasses(
  rgClasses: Pointer;   // ASSOCIATIONELEMENT*
  cClasses: DWORD;   // DWORD
  riid: PGUID;   // GUID*
  ppv: Pointer   // void** out
): Integer; stdcall;
  external 'SHELL32.dll' name 'AssocCreateForClasses';

result := DllCall("SHELL32\AssocCreateForClasses"
    , "Ptr", rgClasses   ; ASSOCIATIONELEMENT*
    , "UInt", cClasses   ; DWORD
    , "Ptr", riid   ; GUID*
    , "Ptr", ppv   ; void** out
    , "Int")   ; return: HRESULT

●AssocCreateForClasses(rgClasses, cClasses, riid, ppv) = DLL("SHELL32.dll", "int AssocCreateForClasses(void*, dword, void*, void*)")
# 呼び出し: AssocCreateForClasses(rgClasses, cClasses, riid, ppv)
# rgClasses : ASSOCIATIONELEMENT* -> "void*"
# cClasses : DWORD -> "dword"
# 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)。