AVIStreamInfoW

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

HRESULT AVIStreamInfoW(
    IAVIStream* pavi,
    AVISTREAMINFOW* psi,
    INT lSize
);

<DllImport("AVIFIL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function AVIStreamInfoW(
    pavi As IntPtr,   ' IAVIStream*
    psi As IntPtr,   ' AVISTREAMINFOW* out
    lSize As Integer   ' INT
) As Integer
End Function

' pavi : IAVIStream*
' psi : AVISTREAMINFOW* out
' lSize : INT
Declare PtrSafe Function AVIStreamInfoW Lib "avifil32" ( _
    ByVal pavi As LongPtr, _
    ByVal psi 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

AVIStreamInfoW = ctypes.windll.avifil32.AVIStreamInfoW
AVIStreamInfoW.restype = ctypes.c_int
AVIStreamInfoW.argtypes = [
    ctypes.c_void_p,  # pavi : IAVIStream*
    ctypes.c_void_p,  # psi : AVISTREAMINFOW* out
    ctypes.c_int,  # lSize : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVIStreamInfoW = Fiddle::Function.new(
  lib['AVIStreamInfoW'],
  [
    Fiddle::TYPE_VOIDP,  # pavi : IAVIStream*
    Fiddle::TYPE_VOIDP,  # psi : AVISTREAMINFOW* out
    Fiddle::TYPE_INT,  # lSize : INT
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "avifil32")]
extern "system" {
    fn AVIStreamInfoW(
        pavi: *mut core::ffi::c_void,  // IAVIStream*
        psi: *mut AVISTREAMINFOW,  // AVISTREAMINFOW* 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 AVIStreamInfoW(IntPtr pavi, IntPtr psi, int lSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVIStreamInfoW' -Namespace Win32 -PassThru
# $api::AVIStreamInfoW(pavi, psi, lSize)

#uselib "AVIFIL32.dll"
#func global AVIStreamInfoW "AVIStreamInfoW" wptr, wptr, wptr
; AVIStreamInfoW pavi, varptr(psi), lSize   ; 戻り値は stat
; pavi : IAVIStream* -> "wptr"
; psi : AVISTREAMINFOW* 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 AVIStreamInfoW "AVIStreamInfoW" sptr, var, int
; res = AVIStreamInfoW(pavi, psi, lSize)
; pavi : IAVIStream* -> "sptr"
; psi : AVISTREAMINFOW* 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 AVIStreamInfoW(IAVIStream* pavi, AVISTREAMINFOW* psi, INT lSize)
#uselib "AVIFIL32.dll"
#cfunc global AVIStreamInfoW "AVIStreamInfoW" intptr, var, int
; res = AVIStreamInfoW(pavi, psi, lSize)
; pavi : IAVIStream* -> "intptr"
; psi : AVISTREAMINFOW* 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")
	procAVIStreamInfoW = avifil32.NewProc("AVIStreamInfoW")
)

// pavi (IAVIStream*), psi (AVISTREAMINFOW* out), lSize (INT)
r1, _, err := procAVIStreamInfoW.Call(
	uintptr(pavi),
	uintptr(psi),
	uintptr(lSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AVIStreamInfoW(
  pavi: Pointer;   // IAVIStream*
  psi: Pointer;   // AVISTREAMINFOW* out
  lSize: Integer   // INT
): Integer; stdcall;
  external 'AVIFIL32.dll' name 'AVIStreamInfoW';

result := DllCall("AVIFIL32\AVIStreamInfoW"
    , "Ptr", pavi   ; IAVIStream*
    , "Ptr", psi   ; AVISTREAMINFOW* out
    , "Int", lSize   ; INT
    , "Int")   ; return: HRESULT

●AVIStreamInfoW(pavi, psi, lSize) = DLL("AVIFIL32.dll", "int AVIStreamInfoW(void*, void*, int)")
# 呼び出し: AVIStreamInfoW(pavi, psi, lSize)
# pavi : IAVIStream* -> "void*"
# psi : AVISTREAMINFOW* 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。