AVIStreamReadFormat

// AVIFIL32.dll
#include <windows.h>

HRESULT AVIStreamReadFormat(
    IAVIStream* pavi,
    INT lPos,
    void* lpFormat,   // optional
    INT* lpcbFormat
);

<DllImport("AVIFIL32.dll", ExactSpelling:=True)>
Public Shared Function AVIStreamReadFormat(
    pavi As IntPtr,   ' IAVIStream*
    lPos As Integer,   ' INT
    lpFormat As IntPtr,   ' void* optional, out
    ByRef lpcbFormat As Integer   ' INT* in/out
) As Integer
End Function

' pavi : IAVIStream*
' lPos : INT
' lpFormat : void* optional, out
' lpcbFormat : INT* in/out
Declare PtrSafe Function AVIStreamReadFormat Lib "avifil32" ( _
    ByVal pavi As LongPtr, _
    ByVal lPos As Long, _
    ByVal lpFormat As LongPtr, _
    ByRef lpcbFormat As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

AVIStreamReadFormat = ctypes.windll.avifil32.AVIStreamReadFormat
AVIStreamReadFormat.restype = ctypes.c_int
AVIStreamReadFormat.argtypes = [
    ctypes.c_void_p,  # pavi : IAVIStream*
    ctypes.c_int,  # lPos : INT
    ctypes.POINTER(None),  # lpFormat : void* optional, out
    ctypes.POINTER(ctypes.c_int),  # lpcbFormat : INT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVIStreamReadFormat = Fiddle::Function.new(
  lib['AVIStreamReadFormat'],
  [
    Fiddle::TYPE_VOIDP,  # pavi : IAVIStream*
    Fiddle::TYPE_INT,  # lPos : INT
    Fiddle::TYPE_VOIDP,  # lpFormat : void* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbFormat : INT* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "avifil32")]
extern "system" {
    fn AVIStreamReadFormat(
        pavi: *mut core::ffi::c_void,  // IAVIStream*
        lPos: i32,  // INT
        lpFormat: *mut (),  // void* optional, out
        lpcbFormat: *mut i32  // INT* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("AVIFIL32.dll")]
public static extern int AVIStreamReadFormat(IntPtr pavi, int lPos, IntPtr lpFormat, ref int lpcbFormat);
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVIStreamReadFormat' -Namespace Win32 -PassThru
# $api::AVIStreamReadFormat(pavi, lPos, lpFormat, lpcbFormat)

#uselib "AVIFIL32.dll"
#func global AVIStreamReadFormat "AVIStreamReadFormat" sptr, sptr, sptr, sptr
; AVIStreamReadFormat pavi, lPos, lpFormat, varptr(lpcbFormat)   ; 戻り値は stat
; pavi : IAVIStream* -> "sptr"
; lPos : INT -> "sptr"
; lpFormat : void* optional, out -> "sptr"
; lpcbFormat : INT* 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 "AVIFIL32.dll"
#cfunc global AVIStreamReadFormat "AVIStreamReadFormat" sptr, int, sptr, var
; res = AVIStreamReadFormat(pavi, lPos, lpFormat, lpcbFormat)
; pavi : IAVIStream* -> "sptr"
; lPos : INT -> "int"
; lpFormat : void* optional, out -> "sptr"
; lpcbFormat : INT* 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 AVIStreamReadFormat(IAVIStream* pavi, INT lPos, void* lpFormat, INT* lpcbFormat)
#uselib "AVIFIL32.dll"
#cfunc global AVIStreamReadFormat "AVIStreamReadFormat" intptr, int, intptr, var
; res = AVIStreamReadFormat(pavi, lPos, lpFormat, lpcbFormat)
; pavi : IAVIStream* -> "intptr"
; lPos : INT -> "int"
; lpFormat : void* optional, out -> "intptr"
; lpcbFormat : INT* 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 (
	avifil32 = windows.NewLazySystemDLL("AVIFIL32.dll")
	procAVIStreamReadFormat = avifil32.NewProc("AVIStreamReadFormat")
)

// pavi (IAVIStream*), lPos (INT), lpFormat (void* optional, out), lpcbFormat (INT* in/out)
r1, _, err := procAVIStreamReadFormat.Call(
	uintptr(pavi),
	uintptr(lPos),
	uintptr(lpFormat),
	uintptr(lpcbFormat),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AVIStreamReadFormat(
  pavi: Pointer;   // IAVIStream*
  lPos: Integer;   // INT
  lpFormat: Pointer;   // void* optional, out
  lpcbFormat: Pointer   // INT* in/out
): Integer; stdcall;
  external 'AVIFIL32.dll' name 'AVIStreamReadFormat';

result := DllCall("AVIFIL32\AVIStreamReadFormat"
    , "Ptr", pavi   ; IAVIStream*
    , "Int", lPos   ; INT
    , "Ptr", lpFormat   ; void* optional, out
    , "Ptr", lpcbFormat   ; INT* in/out
    , "Int")   ; return: HRESULT

●AVIStreamReadFormat(pavi, lPos, lpFormat, lpcbFormat) = DLL("AVIFIL32.dll", "int AVIStreamReadFormat(void*, int, void*, void*)")
# 呼び出し: AVIStreamReadFormat(pavi, lPos, lpFormat, lpcbFormat)
# pavi : IAVIStream* -> "void*"
# lPos : INT -> "int"
# lpFormat : void* optional, out -> "void*"
# lpcbFormat : INT* 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)。