AVIFileInfoW

// AVIFIL32.dll  (Unicode / -W)
#include <windows.h>

HRESULT AVIFileInfoW(
    IAVIFile* pfile,
    AVIFILEINFOW* pfi,
    INT lSize
);

<DllImport("AVIFIL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function AVIFileInfoW(
    pfile As IntPtr,   ' IAVIFile*
    pfi As IntPtr,   ' AVIFILEINFOW* out
    lSize As Integer   ' INT
) As Integer
End Function

' pfile : IAVIFile*
' pfi : AVIFILEINFOW* out
' lSize : INT
Declare PtrSafe Function AVIFileInfoW Lib "avifil32" ( _
    ByVal pfile As LongPtr, _
    ByVal pfi As LongPtr, _
    ByVal lSize As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

AVIFileInfoW = ctypes.windll.avifil32.AVIFileInfoW
AVIFileInfoW.restype = ctypes.c_int
AVIFileInfoW.argtypes = [
    ctypes.c_void_p,  # pfile : IAVIFile*
    ctypes.c_void_p,  # pfi : AVIFILEINFOW* out
    ctypes.c_int,  # lSize : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVIFileInfoW = Fiddle::Function.new(
  lib['AVIFileInfoW'],
  [
    Fiddle::TYPE_VOIDP,  # pfile : IAVIFile*
    Fiddle::TYPE_VOIDP,  # pfi : AVIFILEINFOW* out
    Fiddle::TYPE_INT,  # lSize : INT
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "avifil32")]
extern "system" {
    fn AVIFileInfoW(
        pfile: *mut core::ffi::c_void,  // IAVIFile*
        pfi: *mut AVIFILEINFOW,  // AVIFILEINFOW* out
        lSize: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("AVIFIL32.dll", CharSet = CharSet.Unicode)]
public static extern int AVIFileInfoW(IntPtr pfile, IntPtr pfi, int lSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVIFileInfoW' -Namespace Win32 -PassThru
# $api::AVIFileInfoW(pfile, pfi, lSize)

#uselib "AVIFIL32.dll"
#func global AVIFileInfoW "AVIFileInfoW" wptr, wptr, wptr
; AVIFileInfoW pfile, varptr(pfi), lSize   ; 戻り値は stat
; pfile : IAVIFile* -> "wptr"
; pfi : AVIFILEINFOW* out -> "wptr"
; lSize : INT -> "wptr"
; ※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 "AVIFIL32.dll"
#cfunc global AVIFileInfoW "AVIFileInfoW" sptr, var, int
; res = AVIFileInfoW(pfile, pfi, lSize)
; pfile : IAVIFile* -> "sptr"
; pfi : AVIFILEINFOW* out -> "var"
; lSize : INT -> "int"
; ※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 AVIFileInfoW(IAVIFile* pfile, AVIFILEINFOW* pfi, INT lSize)
#uselib "AVIFIL32.dll"
#cfunc global AVIFileInfoW "AVIFileInfoW" intptr, var, int
; res = AVIFileInfoW(pfile, pfi, lSize)
; pfile : IAVIFile* -> "intptr"
; pfi : AVIFILEINFOW* out -> "var"
; lSize : INT -> "int"
; ※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 (
	avifil32 = windows.NewLazySystemDLL("AVIFIL32.dll")
	procAVIFileInfoW = avifil32.NewProc("AVIFileInfoW")
)

// pfile (IAVIFile*), pfi (AVIFILEINFOW* out), lSize (INT)
r1, _, err := procAVIFileInfoW.Call(
	uintptr(pfile),
	uintptr(pfi),
	uintptr(lSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AVIFileInfoW(
  pfile: Pointer;   // IAVIFile*
  pfi: Pointer;   // AVIFILEINFOW* out
  lSize: Integer   // INT
): Integer; stdcall;
  external 'AVIFIL32.dll' name 'AVIFileInfoW';

result := DllCall("AVIFIL32\AVIFileInfoW"
    , "Ptr", pfile   ; IAVIFile*
    , "Ptr", pfi   ; AVIFILEINFOW* out
    , "Int", lSize   ; INT
    , "Int")   ; return: HRESULT

●AVIFileInfoW(pfile, pfi, lSize) = DLL("AVIFIL32.dll", "int AVIFileInfoW(void*, void*, int)")
# 呼び出し: AVIFileInfoW(pfile, pfi, lSize)
# pfile : IAVIFile* -> "void*"
# pfi : AVIFILEINFOW* out -> "void*"
# lSize : INT -> "int"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。