AVISaveVW

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

HRESULT AVISaveVW(
    LPCWSTR szFile,
    GUID* pclsidHandler,   // optional
    AVISAVECALLBACK lpfnCallback,
    INT nStreams,
    IAVIStream** ppavi,
    AVICOMPRESSOPTIONS** plpOptions
);

<DllImport("AVIFIL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function AVISaveVW(
    <MarshalAs(UnmanagedType.LPWStr)> szFile As String,   ' LPCWSTR
    pclsidHandler As IntPtr,   ' GUID* optional
    lpfnCallback As IntPtr,   ' AVISAVECALLBACK
    nStreams As Integer,   ' INT
    ppavi As IntPtr,   ' IAVIStream**
    plpOptions As IntPtr   ' AVICOMPRESSOPTIONS**
) As Integer
End Function

' szFile : LPCWSTR
' pclsidHandler : GUID* optional
' lpfnCallback : AVISAVECALLBACK
' nStreams : INT
' ppavi : IAVIStream**
' plpOptions : AVICOMPRESSOPTIONS**
Declare PtrSafe Function AVISaveVW Lib "avifil32" ( _
    ByVal szFile As LongPtr, _
    ByVal pclsidHandler As LongPtr, _
    ByVal lpfnCallback As LongPtr, _
    ByVal nStreams As Long, _
    ByVal ppavi As LongPtr, _
    ByVal plpOptions As LongPtr) 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

AVISaveVW = ctypes.windll.avifil32.AVISaveVW
AVISaveVW.restype = ctypes.c_int
AVISaveVW.argtypes = [
    wintypes.LPCWSTR,  # szFile : LPCWSTR
    ctypes.c_void_p,  # pclsidHandler : GUID* optional
    ctypes.c_void_p,  # lpfnCallback : AVISAVECALLBACK
    ctypes.c_int,  # nStreams : INT
    ctypes.c_void_p,  # ppavi : IAVIStream**
    ctypes.c_void_p,  # plpOptions : AVICOMPRESSOPTIONS**
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVISaveVW = Fiddle::Function.new(
  lib['AVISaveVW'],
  [
    Fiddle::TYPE_VOIDP,  # szFile : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pclsidHandler : GUID* optional
    Fiddle::TYPE_VOIDP,  # lpfnCallback : AVISAVECALLBACK
    Fiddle::TYPE_INT,  # nStreams : INT
    Fiddle::TYPE_VOIDP,  # ppavi : IAVIStream**
    Fiddle::TYPE_VOIDP,  # plpOptions : AVICOMPRESSOPTIONS**
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "avifil32")]
extern "system" {
    fn AVISaveVW(
        szFile: *const u16,  // LPCWSTR
        pclsidHandler: *mut GUID,  // GUID* optional
        lpfnCallback: *const core::ffi::c_void,  // AVISAVECALLBACK
        nStreams: i32,  // INT
        ppavi: *mut *mut core::ffi::c_void,  // IAVIStream**
        plpOptions: *mut *mut AVICOMPRESSOPTIONS  // AVICOMPRESSOPTIONS**
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("AVIFIL32.dll", CharSet = CharSet.Unicode)]
public static extern int AVISaveVW([MarshalAs(UnmanagedType.LPWStr)] string szFile, IntPtr pclsidHandler, IntPtr lpfnCallback, int nStreams, IntPtr ppavi, IntPtr plpOptions);
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVISaveVW' -Namespace Win32 -PassThru
# $api::AVISaveVW(szFile, pclsidHandler, lpfnCallback, nStreams, ppavi, plpOptions)

#uselib "AVIFIL32.dll"
#func global AVISaveVW "AVISaveVW" wptr, wptr, wptr, wptr, wptr, wptr
; AVISaveVW szFile, varptr(pclsidHandler), lpfnCallback, nStreams, ppavi, varptr(plpOptions)   ; 戻り値は stat
; szFile : LPCWSTR -> "wptr"
; pclsidHandler : GUID* optional -> "wptr"
; lpfnCallback : AVISAVECALLBACK -> "wptr"
; nStreams : INT -> "wptr"
; ppavi : IAVIStream** -> "wptr"
; plpOptions : AVICOMPRESSOPTIONS** -> "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 AVISaveVW "AVISaveVW" wstr, var, sptr, int, sptr, var
; res = AVISaveVW(szFile, pclsidHandler, lpfnCallback, nStreams, ppavi, plpOptions)
; szFile : LPCWSTR -> "wstr"
; pclsidHandler : GUID* optional -> "var"
; lpfnCallback : AVISAVECALLBACK -> "sptr"
; nStreams : INT -> "int"
; ppavi : IAVIStream** -> "sptr"
; plpOptions : AVICOMPRESSOPTIONS** -> "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 AVISaveVW(LPCWSTR szFile, GUID* pclsidHandler, AVISAVECALLBACK lpfnCallback, INT nStreams, IAVIStream** ppavi, AVICOMPRESSOPTIONS** plpOptions)
#uselib "AVIFIL32.dll"
#cfunc global AVISaveVW "AVISaveVW" wstr, var, intptr, int, intptr, var
; res = AVISaveVW(szFile, pclsidHandler, lpfnCallback, nStreams, ppavi, plpOptions)
; szFile : LPCWSTR -> "wstr"
; pclsidHandler : GUID* optional -> "var"
; lpfnCallback : AVISAVECALLBACK -> "intptr"
; nStreams : INT -> "int"
; ppavi : IAVIStream** -> "intptr"
; plpOptions : AVICOMPRESSOPTIONS** -> "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")
	procAVISaveVW = avifil32.NewProc("AVISaveVW")
)

// szFile (LPCWSTR), pclsidHandler (GUID* optional), lpfnCallback (AVISAVECALLBACK), nStreams (INT), ppavi (IAVIStream**), plpOptions (AVICOMPRESSOPTIONS**)
r1, _, err := procAVISaveVW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szFile))),
	uintptr(pclsidHandler),
	uintptr(lpfnCallback),
	uintptr(nStreams),
	uintptr(ppavi),
	uintptr(plpOptions),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AVISaveVW(
  szFile: PWideChar;   // LPCWSTR
  pclsidHandler: PGUID;   // GUID* optional
  lpfnCallback: Pointer;   // AVISAVECALLBACK
  nStreams: Integer;   // INT
  ppavi: Pointer;   // IAVIStream**
  plpOptions: Pointer   // AVICOMPRESSOPTIONS**
): Integer; stdcall;
  external 'AVIFIL32.dll' name 'AVISaveVW';

result := DllCall("AVIFIL32\AVISaveVW"
    , "WStr", szFile   ; LPCWSTR
    , "Ptr", pclsidHandler   ; GUID* optional
    , "Ptr", lpfnCallback   ; AVISAVECALLBACK
    , "Int", nStreams   ; INT
    , "Ptr", ppavi   ; IAVIStream**
    , "Ptr", plpOptions   ; AVICOMPRESSOPTIONS**
    , "Int")   ; return: HRESULT

●AVISaveVW(szFile, pclsidHandler, lpfnCallback, nStreams, ppavi, plpOptions) = DLL("AVIFIL32.dll", "int AVISaveVW(char*, void*, void*, int, void*, void*)")
# 呼び出し: AVISaveVW(szFile, pclsidHandler, lpfnCallback, nStreams, ppavi, plpOptions)
# szFile : LPCWSTR -> "char*"
# pclsidHandler : GUID* optional -> "void*"
# lpfnCallback : AVISAVECALLBACK -> "void*"
# nStreams : INT -> "int"
# ppavi : IAVIStream** -> "void*"
# plpOptions : AVICOMPRESSOPTIONS** -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。