CoCreateInstanceFromApp

// OLE32.dll
#include <windows.h>

HRESULT CoCreateInstanceFromApp(
    const GUID* Clsid,
    IUnknown* punkOuter,   // optional
    CLSCTX dwClsCtx,
    void* reserved,   // optional
    DWORD dwCount,
    MULTI_QI* pResults
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function CoCreateInstanceFromApp(
    ByRef Clsid As Guid,   ' GUID*
    punkOuter As IntPtr,   ' IUnknown* optional
    dwClsCtx As UInteger,   ' CLSCTX
    reserved As IntPtr,   ' void* optional
    dwCount As UInteger,   ' DWORD
    pResults As IntPtr   ' MULTI_QI* in/out
) As Integer
End Function

' Clsid : GUID*
' punkOuter : IUnknown* optional
' dwClsCtx : CLSCTX
' reserved : void* optional
' dwCount : DWORD
' pResults : MULTI_QI* in/out
Declare PtrSafe Function CoCreateInstanceFromApp Lib "ole32" ( _
    ByVal Clsid As LongPtr, _
    ByVal punkOuter As LongPtr, _
    ByVal dwClsCtx As Long, _
    ByVal reserved As LongPtr, _
    ByVal dwCount As Long, _
    ByVal pResults 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

CoCreateInstanceFromApp = ctypes.windll.ole32.CoCreateInstanceFromApp
CoCreateInstanceFromApp.restype = ctypes.c_int
CoCreateInstanceFromApp.argtypes = [
    ctypes.c_void_p,  # Clsid : GUID*
    ctypes.c_void_p,  # punkOuter : IUnknown* optional
    wintypes.DWORD,  # dwClsCtx : CLSCTX
    ctypes.POINTER(None),  # reserved : void* optional
    wintypes.DWORD,  # dwCount : DWORD
    ctypes.c_void_p,  # pResults : MULTI_QI* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
CoCreateInstanceFromApp = Fiddle::Function.new(
  lib['CoCreateInstanceFromApp'],
  [
    Fiddle::TYPE_VOIDP,  # Clsid : GUID*
    Fiddle::TYPE_VOIDP,  # punkOuter : IUnknown* optional
    -Fiddle::TYPE_INT,  # dwClsCtx : CLSCTX
    Fiddle::TYPE_VOIDP,  # reserved : void* optional
    -Fiddle::TYPE_INT,  # dwCount : DWORD
    Fiddle::TYPE_VOIDP,  # pResults : MULTI_QI* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn CoCreateInstanceFromApp(
        Clsid: *const GUID,  // GUID*
        punkOuter: *mut core::ffi::c_void,  // IUnknown* optional
        dwClsCtx: u32,  // CLSCTX
        reserved: *mut (),  // void* optional
        dwCount: u32,  // DWORD
        pResults: *mut MULTI_QI  // MULTI_QI* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int CoCreateInstanceFromApp(ref Guid Clsid, IntPtr punkOuter, uint dwClsCtx, IntPtr reserved, uint dwCount, IntPtr pResults);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_CoCreateInstanceFromApp' -Namespace Win32 -PassThru
# $api::CoCreateInstanceFromApp(Clsid, punkOuter, dwClsCtx, reserved, dwCount, pResults)

#uselib "OLE32.dll"
#func global CoCreateInstanceFromApp "CoCreateInstanceFromApp" sptr, sptr, sptr, sptr, sptr, sptr
; CoCreateInstanceFromApp varptr(Clsid), punkOuter, dwClsCtx, reserved, dwCount, varptr(pResults)   ; 戻り値は stat
; Clsid : GUID* -> "sptr"
; punkOuter : IUnknown* optional -> "sptr"
; dwClsCtx : CLSCTX -> "sptr"
; reserved : void* optional -> "sptr"
; dwCount : DWORD -> "sptr"
; pResults : MULTI_QI* in/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 "OLE32.dll"
#cfunc global CoCreateInstanceFromApp "CoCreateInstanceFromApp" var, sptr, int, sptr, int, var
; res = CoCreateInstanceFromApp(Clsid, punkOuter, dwClsCtx, reserved, dwCount, pResults)
; Clsid : GUID* -> "var"
; punkOuter : IUnknown* optional -> "sptr"
; dwClsCtx : CLSCTX -> "int"
; reserved : void* optional -> "sptr"
; dwCount : DWORD -> "int"
; pResults : MULTI_QI* in/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 CoCreateInstanceFromApp(GUID* Clsid, IUnknown* punkOuter, CLSCTX dwClsCtx, void* reserved, DWORD dwCount, MULTI_QI* pResults)
#uselib "OLE32.dll"
#cfunc global CoCreateInstanceFromApp "CoCreateInstanceFromApp" var, intptr, int, intptr, int, var
; res = CoCreateInstanceFromApp(Clsid, punkOuter, dwClsCtx, reserved, dwCount, pResults)
; Clsid : GUID* -> "var"
; punkOuter : IUnknown* optional -> "intptr"
; dwClsCtx : CLSCTX -> "int"
; reserved : void* optional -> "intptr"
; dwCount : DWORD -> "int"
; pResults : MULTI_QI* in/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 (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procCoCreateInstanceFromApp = ole32.NewProc("CoCreateInstanceFromApp")
)

// Clsid (GUID*), punkOuter (IUnknown* optional), dwClsCtx (CLSCTX), reserved (void* optional), dwCount (DWORD), pResults (MULTI_QI* in/out)
r1, _, err := procCoCreateInstanceFromApp.Call(
	uintptr(Clsid),
	uintptr(punkOuter),
	uintptr(dwClsCtx),
	uintptr(reserved),
	uintptr(dwCount),
	uintptr(pResults),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoCreateInstanceFromApp(
  Clsid: PGUID;   // GUID*
  punkOuter: Pointer;   // IUnknown* optional
  dwClsCtx: DWORD;   // CLSCTX
  reserved: Pointer;   // void* optional
  dwCount: DWORD;   // DWORD
  pResults: Pointer   // MULTI_QI* in/out
): Integer; stdcall;
  external 'OLE32.dll' name 'CoCreateInstanceFromApp';

result := DllCall("OLE32\CoCreateInstanceFromApp"
    , "Ptr", Clsid   ; GUID*
    , "Ptr", punkOuter   ; IUnknown* optional
    , "UInt", dwClsCtx   ; CLSCTX
    , "Ptr", reserved   ; void* optional
    , "UInt", dwCount   ; DWORD
    , "Ptr", pResults   ; MULTI_QI* in/out
    , "Int")   ; return: HRESULT

●CoCreateInstanceFromApp(Clsid, punkOuter, dwClsCtx, reserved, dwCount, pResults) = DLL("OLE32.dll", "int CoCreateInstanceFromApp(void*, void*, dword, void*, dword, void*)")
# 呼び出し: CoCreateInstanceFromApp(Clsid, punkOuter, dwClsCtx, reserved, dwCount, pResults)
# Clsid : GUID* -> "void*"
# punkOuter : IUnknown* optional -> "void*"
# dwClsCtx : CLSCTX -> "dword"
# reserved : void* optional -> "void*"
# dwCount : DWORD -> "dword"
# pResults : MULTI_QI* in/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)。