SHCoCreateInstance

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

HRESULT SHCoCreateInstance(
    LPCWSTR pszCLSID,   // optional
    const GUID* pclsid,   // optional
    IUnknown* pUnkOuter,   // optional
    const GUID* riid,
    void** ppv
);

<DllImport("SHELL32.dll", ExactSpelling:=True)>
Public Shared Function SHCoCreateInstance(
    <MarshalAs(UnmanagedType.LPWStr)> pszCLSID As String,   ' LPCWSTR optional
    pclsid As IntPtr,   ' GUID* optional
    pUnkOuter As IntPtr,   ' IUnknown* optional
    ByRef riid As Guid,   ' GUID*
    ppv As IntPtr   ' void** out
) As Integer
End Function

' pszCLSID : LPCWSTR optional
' pclsid : GUID* optional
' pUnkOuter : IUnknown* optional
' riid : GUID*
' ppv : void** out
Declare PtrSafe Function SHCoCreateInstance Lib "shell32" ( _
    ByVal pszCLSID As LongPtr, _
    ByVal pclsid As LongPtr, _
    ByVal pUnkOuter 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

SHCoCreateInstance = ctypes.windll.shell32.SHCoCreateInstance
SHCoCreateInstance.restype = ctypes.c_int
SHCoCreateInstance.argtypes = [
    wintypes.LPCWSTR,  # pszCLSID : LPCWSTR optional
    ctypes.c_void_p,  # pclsid : GUID* optional
    ctypes.c_void_p,  # pUnkOuter : IUnknown* optional
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppv : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHCoCreateInstance = Fiddle::Function.new(
  lib['SHCoCreateInstance'],
  [
    Fiddle::TYPE_VOIDP,  # pszCLSID : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pclsid : GUID* optional
    Fiddle::TYPE_VOIDP,  # pUnkOuter : IUnknown* optional
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppv : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn SHCoCreateInstance(
        pszCLSID: *const u16,  // LPCWSTR optional
        pclsid: *const GUID,  // GUID* optional
        pUnkOuter: *mut core::ffi::c_void,  // IUnknown* optional
        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 SHCoCreateInstance([MarshalAs(UnmanagedType.LPWStr)] string pszCLSID, IntPtr pclsid, IntPtr pUnkOuter, ref Guid riid, IntPtr ppv);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHCoCreateInstance' -Namespace Win32 -PassThru
# $api::SHCoCreateInstance(pszCLSID, pclsid, pUnkOuter, riid, ppv)

#uselib "SHELL32.dll"
#func global SHCoCreateInstance "SHCoCreateInstance" sptr, sptr, sptr, sptr, sptr
; SHCoCreateInstance pszCLSID, varptr(pclsid), pUnkOuter, varptr(riid), ppv   ; 戻り値は stat
; pszCLSID : LPCWSTR optional -> "sptr"
; pclsid : GUID* optional -> "sptr"
; pUnkOuter : IUnknown* optional -> "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 SHCoCreateInstance "SHCoCreateInstance" wstr, var, sptr, var, sptr
; res = SHCoCreateInstance(pszCLSID, pclsid, pUnkOuter, riid, ppv)
; pszCLSID : LPCWSTR optional -> "wstr"
; pclsid : GUID* optional -> "var"
; pUnkOuter : IUnknown* optional -> "sptr"
; 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 SHCoCreateInstance(LPCWSTR pszCLSID, GUID* pclsid, IUnknown* pUnkOuter, GUID* riid, void** ppv)
#uselib "SHELL32.dll"
#cfunc global SHCoCreateInstance "SHCoCreateInstance" wstr, var, intptr, var, intptr
; res = SHCoCreateInstance(pszCLSID, pclsid, pUnkOuter, riid, ppv)
; pszCLSID : LPCWSTR optional -> "wstr"
; pclsid : GUID* optional -> "var"
; pUnkOuter : IUnknown* optional -> "intptr"
; 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")
	procSHCoCreateInstance = shell32.NewProc("SHCoCreateInstance")
)

// pszCLSID (LPCWSTR optional), pclsid (GUID* optional), pUnkOuter (IUnknown* optional), riid (GUID*), ppv (void** out)
r1, _, err := procSHCoCreateInstance.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszCLSID))),
	uintptr(pclsid),
	uintptr(pUnkOuter),
	uintptr(riid),
	uintptr(ppv),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SHCoCreateInstance(
  pszCLSID: PWideChar;   // LPCWSTR optional
  pclsid: PGUID;   // GUID* optional
  pUnkOuter: Pointer;   // IUnknown* optional
  riid: PGUID;   // GUID*
  ppv: Pointer   // void** out
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHCoCreateInstance';

result := DllCall("SHELL32\SHCoCreateInstance"
    , "WStr", pszCLSID   ; LPCWSTR optional
    , "Ptr", pclsid   ; GUID* optional
    , "Ptr", pUnkOuter   ; IUnknown* optional
    , "Ptr", riid   ; GUID*
    , "Ptr", ppv   ; void** out
    , "Int")   ; return: HRESULT

●SHCoCreateInstance(pszCLSID, pclsid, pUnkOuter, riid, ppv) = DLL("SHELL32.dll", "int SHCoCreateInstance(char*, void*, void*, void*, void*)")
# 呼び出し: SHCoCreateInstance(pszCLSID, pclsid, pUnkOuter, riid, ppv)
# pszCLSID : LPCWSTR optional -> "char*"
# pclsid : GUID* optional -> "void*"
# pUnkOuter : IUnknown* optional -> "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)。