AVIStreamLength

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

INT AVIStreamLength(
    IAVIStream* pavi
);

<DllImport("AVIFIL32.dll", ExactSpelling:=True)>
Public Shared Function AVIStreamLength(
    pavi As IntPtr   ' IAVIStream*
) As Integer
End Function

' pavi : IAVIStream*
Declare PtrSafe Function AVIStreamLength Lib "avifil32" ( _
    ByVal pavi 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

AVIStreamLength = ctypes.windll.avifil32.AVIStreamLength
AVIStreamLength.restype = ctypes.c_int
AVIStreamLength.argtypes = [
    ctypes.c_void_p,  # pavi : IAVIStream*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVIStreamLength = Fiddle::Function.new(
  lib['AVIStreamLength'],
  [
    Fiddle::TYPE_VOIDP,  # pavi : IAVIStream*
  ],
  Fiddle::TYPE_INT)

#[link(name = "avifil32")]
extern "system" {
    fn AVIStreamLength(
        pavi: *mut core::ffi::c_void  // IAVIStream*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("AVIFIL32.dll")]
public static extern int AVIStreamLength(IntPtr pavi);
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVIStreamLength' -Namespace Win32 -PassThru
# $api::AVIStreamLength(pavi)

#uselib "AVIFIL32.dll"
#func global AVIStreamLength "AVIStreamLength" sptr
; AVIStreamLength pavi   ; 戻り値は stat
; pavi : IAVIStream* -> "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 AVIStreamLength "AVIStreamLength" sptr
; res = AVIStreamLength(pavi)
; pavi : IAVIStream* -> "sptr"

; INT AVIStreamLength(IAVIStream* pavi)
#uselib "AVIFIL32.dll"
#cfunc global AVIStreamLength "AVIStreamLength" intptr
; res = AVIStreamLength(pavi)
; pavi : IAVIStream* -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	avifil32 = windows.NewLazySystemDLL("AVIFIL32.dll")
	procAVIStreamLength = avifil32.NewProc("AVIStreamLength")
)

// pavi (IAVIStream*)
r1, _, err := procAVIStreamLength.Call(
	uintptr(pavi),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function AVIStreamLength(
  pavi: Pointer   // IAVIStream*
): Integer; stdcall;
  external 'AVIFIL32.dll' name 'AVIStreamLength';

result := DllCall("AVIFIL32\AVIStreamLength"
    , "Ptr", pavi   ; IAVIStream*
    , "Int")   ; return: INT

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