OleLoadPicturePath

// OLEAUT32.dll
#include <windows.h>

HRESULT OleLoadPicturePath(
    LPWSTR szURLorPath,
    IUnknown* punkCaller,
    DWORD dwReserved,
    DWORD clrReserved,
    const GUID* riid,
    void** ppvRet
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function OleLoadPicturePath(
    <MarshalAs(UnmanagedType.LPWStr)> szURLorPath As String,   ' LPWSTR
    punkCaller As IntPtr,   ' IUnknown*
    dwReserved As UInteger,   ' DWORD
    clrReserved As UInteger,   ' DWORD
    ByRef riid As Guid,   ' GUID*
    ppvRet As IntPtr   ' void** out
) As Integer
End Function

' szURLorPath : LPWSTR
' punkCaller : IUnknown*
' dwReserved : DWORD
' clrReserved : DWORD
' riid : GUID*
' ppvRet : void** out
Declare PtrSafe Function OleLoadPicturePath Lib "oleaut32" ( _
    ByVal szURLorPath As LongPtr, _
    ByVal punkCaller As LongPtr, _
    ByVal dwReserved As Long, _
    ByVal clrReserved As Long, _
    ByVal riid As LongPtr, _
    ByVal ppvRet 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

OleLoadPicturePath = ctypes.windll.oleaut32.OleLoadPicturePath
OleLoadPicturePath.restype = ctypes.c_int
OleLoadPicturePath.argtypes = [
    wintypes.LPCWSTR,  # szURLorPath : LPWSTR
    ctypes.c_void_p,  # punkCaller : IUnknown*
    wintypes.DWORD,  # dwReserved : DWORD
    wintypes.DWORD,  # clrReserved : DWORD
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppvRet : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
OleLoadPicturePath = Fiddle::Function.new(
  lib['OleLoadPicturePath'],
  [
    Fiddle::TYPE_VOIDP,  # szURLorPath : LPWSTR
    Fiddle::TYPE_VOIDP,  # punkCaller : IUnknown*
    -Fiddle::TYPE_INT,  # dwReserved : DWORD
    -Fiddle::TYPE_INT,  # clrReserved : DWORD
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppvRet : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn OleLoadPicturePath(
        szURLorPath: *mut u16,  // LPWSTR
        punkCaller: *mut core::ffi::c_void,  // IUnknown*
        dwReserved: u32,  // DWORD
        clrReserved: u32,  // DWORD
        riid: *const GUID,  // GUID*
        ppvRet: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int OleLoadPicturePath([MarshalAs(UnmanagedType.LPWStr)] string szURLorPath, IntPtr punkCaller, uint dwReserved, uint clrReserved, ref Guid riid, IntPtr ppvRet);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_OleLoadPicturePath' -Namespace Win32 -PassThru
# $api::OleLoadPicturePath(szURLorPath, punkCaller, dwReserved, clrReserved, riid, ppvRet)

#uselib "OLEAUT32.dll"
#func global OleLoadPicturePath "OleLoadPicturePath" sptr, sptr, sptr, sptr, sptr, sptr
; OleLoadPicturePath szURLorPath, punkCaller, dwReserved, clrReserved, varptr(riid), ppvRet   ; 戻り値は stat
; szURLorPath : LPWSTR -> "sptr"
; punkCaller : IUnknown* -> "sptr"
; dwReserved : DWORD -> "sptr"
; clrReserved : DWORD -> "sptr"
; riid : GUID* -> "sptr"
; ppvRet : 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 "OLEAUT32.dll"
#cfunc global OleLoadPicturePath "OleLoadPicturePath" wstr, sptr, int, int, var, sptr
; res = OleLoadPicturePath(szURLorPath, punkCaller, dwReserved, clrReserved, riid, ppvRet)
; szURLorPath : LPWSTR -> "wstr"
; punkCaller : IUnknown* -> "sptr"
; dwReserved : DWORD -> "int"
; clrReserved : DWORD -> "int"
; riid : GUID* -> "var"
; ppvRet : 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 OleLoadPicturePath(LPWSTR szURLorPath, IUnknown* punkCaller, DWORD dwReserved, DWORD clrReserved, GUID* riid, void** ppvRet)
#uselib "OLEAUT32.dll"
#cfunc global OleLoadPicturePath "OleLoadPicturePath" wstr, intptr, int, int, var, intptr
; res = OleLoadPicturePath(szURLorPath, punkCaller, dwReserved, clrReserved, riid, ppvRet)
; szURLorPath : LPWSTR -> "wstr"
; punkCaller : IUnknown* -> "intptr"
; dwReserved : DWORD -> "int"
; clrReserved : DWORD -> "int"
; riid : GUID* -> "var"
; ppvRet : 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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procOleLoadPicturePath = oleaut32.NewProc("OleLoadPicturePath")
)

// szURLorPath (LPWSTR), punkCaller (IUnknown*), dwReserved (DWORD), clrReserved (DWORD), riid (GUID*), ppvRet (void** out)
r1, _, err := procOleLoadPicturePath.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szURLorPath))),
	uintptr(punkCaller),
	uintptr(dwReserved),
	uintptr(clrReserved),
	uintptr(riid),
	uintptr(ppvRet),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleLoadPicturePath(
  szURLorPath: PWideChar;   // LPWSTR
  punkCaller: Pointer;   // IUnknown*
  dwReserved: DWORD;   // DWORD
  clrReserved: DWORD;   // DWORD
  riid: PGUID;   // GUID*
  ppvRet: Pointer   // void** out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'OleLoadPicturePath';

result := DllCall("OLEAUT32\OleLoadPicturePath"
    , "WStr", szURLorPath   ; LPWSTR
    , "Ptr", punkCaller   ; IUnknown*
    , "UInt", dwReserved   ; DWORD
    , "UInt", clrReserved   ; DWORD
    , "Ptr", riid   ; GUID*
    , "Ptr", ppvRet   ; void** out
    , "Int")   ; return: HRESULT

●OleLoadPicturePath(szURLorPath, punkCaller, dwReserved, clrReserved, riid, ppvRet) = DLL("OLEAUT32.dll", "int OleLoadPicturePath(char*, void*, dword, dword, void*, void*)")
# 呼び出し: OleLoadPicturePath(szURLorPath, punkCaller, dwReserved, clrReserved, riid, ppvRet)
# szURLorPath : LPWSTR -> "char*"
# punkCaller : IUnknown* -> "void*"
# dwReserved : DWORD -> "dword"
# clrReserved : DWORD -> "dword"
# riid : GUID* -> "void*"
# ppvRet : 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)。