ConnectToConnectionPoint

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

HRESULT ConnectToConnectionPoint(
    IUnknown* punk,   // optional
    const GUID* riidEvent,
    BOOL fConnect,
    IUnknown* punkTarget,
    DWORD* pdwCookie,
    IConnectionPoint** ppcpOut   // optional
);

<DllImport("SHLWAPI.dll", ExactSpelling:=True)>
Public Shared Function ConnectToConnectionPoint(
    punk As IntPtr,   ' IUnknown* optional
    ByRef riidEvent As Guid,   ' GUID*
    fConnect As Boolean,   ' BOOL
    punkTarget As IntPtr,   ' IUnknown*
    <Out> ByRef pdwCookie As UInteger,   ' DWORD* out
    ppcpOut As IntPtr   ' IConnectionPoint** optional, out
) As Integer
End Function

' punk : IUnknown* optional
' riidEvent : GUID*
' fConnect : BOOL
' punkTarget : IUnknown*
' pdwCookie : DWORD* out
' ppcpOut : IConnectionPoint** optional, out
Declare PtrSafe Function ConnectToConnectionPoint Lib "shlwapi" ( _
    ByVal punk As LongPtr, _
    ByVal riidEvent As LongPtr, _
    ByVal fConnect As Long, _
    ByVal punkTarget As LongPtr, _
    ByRef pdwCookie As Long, _
    ByVal ppcpOut 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

ConnectToConnectionPoint = ctypes.windll.shlwapi.ConnectToConnectionPoint
ConnectToConnectionPoint.restype = ctypes.c_int
ConnectToConnectionPoint.argtypes = [
    ctypes.c_void_p,  # punk : IUnknown* optional
    ctypes.c_void_p,  # riidEvent : GUID*
    wintypes.BOOL,  # fConnect : BOOL
    ctypes.c_void_p,  # punkTarget : IUnknown*
    ctypes.POINTER(wintypes.DWORD),  # pdwCookie : DWORD* out
    ctypes.c_void_p,  # ppcpOut : IConnectionPoint** optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
ConnectToConnectionPoint = Fiddle::Function.new(
  lib['ConnectToConnectionPoint'],
  [
    Fiddle::TYPE_VOIDP,  # punk : IUnknown* optional
    Fiddle::TYPE_VOIDP,  # riidEvent : GUID*
    Fiddle::TYPE_INT,  # fConnect : BOOL
    Fiddle::TYPE_VOIDP,  # punkTarget : IUnknown*
    Fiddle::TYPE_VOIDP,  # pdwCookie : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppcpOut : IConnectionPoint** optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shlwapi")]
extern "system" {
    fn ConnectToConnectionPoint(
        punk: *mut core::ffi::c_void,  // IUnknown* optional
        riidEvent: *const GUID,  // GUID*
        fConnect: i32,  // BOOL
        punkTarget: *mut core::ffi::c_void,  // IUnknown*
        pdwCookie: *mut u32,  // DWORD* out
        ppcpOut: *mut *mut core::ffi::c_void  // IConnectionPoint** optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll")]
public static extern int ConnectToConnectionPoint(IntPtr punk, ref Guid riidEvent, bool fConnect, IntPtr punkTarget, out uint pdwCookie, IntPtr ppcpOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_ConnectToConnectionPoint' -Namespace Win32 -PassThru
# $api::ConnectToConnectionPoint(punk, riidEvent, fConnect, punkTarget, pdwCookie, ppcpOut)

#uselib "SHLWAPI.dll"
#func global ConnectToConnectionPoint "ConnectToConnectionPoint" sptr, sptr, sptr, sptr, sptr, sptr
; ConnectToConnectionPoint punk, varptr(riidEvent), fConnect, punkTarget, varptr(pdwCookie), ppcpOut   ; 戻り値は stat
; punk : IUnknown* optional -> "sptr"
; riidEvent : GUID* -> "sptr"
; fConnect : BOOL -> "sptr"
; punkTarget : IUnknown* -> "sptr"
; pdwCookie : DWORD* out -> "sptr"
; ppcpOut : IConnectionPoint** optional, 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 "SHLWAPI.dll"
#cfunc global ConnectToConnectionPoint "ConnectToConnectionPoint" sptr, var, int, sptr, var, sptr
; res = ConnectToConnectionPoint(punk, riidEvent, fConnect, punkTarget, pdwCookie, ppcpOut)
; punk : IUnknown* optional -> "sptr"
; riidEvent : GUID* -> "var"
; fConnect : BOOL -> "int"
; punkTarget : IUnknown* -> "sptr"
; pdwCookie : DWORD* out -> "var"
; ppcpOut : IConnectionPoint** optional, 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 ConnectToConnectionPoint(IUnknown* punk, GUID* riidEvent, BOOL fConnect, IUnknown* punkTarget, DWORD* pdwCookie, IConnectionPoint** ppcpOut)
#uselib "SHLWAPI.dll"
#cfunc global ConnectToConnectionPoint "ConnectToConnectionPoint" intptr, var, int, intptr, var, intptr
; res = ConnectToConnectionPoint(punk, riidEvent, fConnect, punkTarget, pdwCookie, ppcpOut)
; punk : IUnknown* optional -> "intptr"
; riidEvent : GUID* -> "var"
; fConnect : BOOL -> "int"
; punkTarget : IUnknown* -> "intptr"
; pdwCookie : DWORD* out -> "var"
; ppcpOut : IConnectionPoint** optional, 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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procConnectToConnectionPoint = shlwapi.NewProc("ConnectToConnectionPoint")
)

// punk (IUnknown* optional), riidEvent (GUID*), fConnect (BOOL), punkTarget (IUnknown*), pdwCookie (DWORD* out), ppcpOut (IConnectionPoint** optional, out)
r1, _, err := procConnectToConnectionPoint.Call(
	uintptr(punk),
	uintptr(riidEvent),
	uintptr(fConnect),
	uintptr(punkTarget),
	uintptr(pdwCookie),
	uintptr(ppcpOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function ConnectToConnectionPoint(
  punk: Pointer;   // IUnknown* optional
  riidEvent: PGUID;   // GUID*
  fConnect: BOOL;   // BOOL
  punkTarget: Pointer;   // IUnknown*
  pdwCookie: Pointer;   // DWORD* out
  ppcpOut: Pointer   // IConnectionPoint** optional, out
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'ConnectToConnectionPoint';

result := DllCall("SHLWAPI\ConnectToConnectionPoint"
    , "Ptr", punk   ; IUnknown* optional
    , "Ptr", riidEvent   ; GUID*
    , "Int", fConnect   ; BOOL
    , "Ptr", punkTarget   ; IUnknown*
    , "Ptr", pdwCookie   ; DWORD* out
    , "Ptr", ppcpOut   ; IConnectionPoint** optional, out
    , "Int")   ; return: HRESULT

●ConnectToConnectionPoint(punk, riidEvent, fConnect, punkTarget, pdwCookie, ppcpOut) = DLL("SHLWAPI.dll", "int ConnectToConnectionPoint(void*, void*, bool, void*, void*, void*)")
# 呼び出し: ConnectToConnectionPoint(punk, riidEvent, fConnect, punkTarget, pdwCookie, ppcpOut)
# punk : IUnknown* optional -> "void*"
# riidEvent : GUID* -> "void*"
# fConnect : BOOL -> "bool"
# punkTarget : IUnknown* -> "void*"
# pdwCookie : DWORD* out -> "void*"
# ppcpOut : IConnectionPoint** optional, 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)。