AVIStreamGetFrame

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

void* AVIStreamGetFrame(
    IGetFrame* pg,
    INT lPos
);

<DllImport("AVIFIL32.dll", ExactSpelling:=True)>
Public Shared Function AVIStreamGetFrame(
    pg As IntPtr,   ' IGetFrame*
    lPos As Integer   ' INT
) As IntPtr
End Function

' pg : IGetFrame*
' lPos : INT
Declare PtrSafe Function AVIStreamGetFrame Lib "avifil32" ( _
    ByVal pg As LongPtr, _
    ByVal lPos As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

AVIStreamGetFrame = ctypes.windll.avifil32.AVIStreamGetFrame
AVIStreamGetFrame.restype = ctypes.c_void_p
AVIStreamGetFrame.argtypes = [
    ctypes.c_void_p,  # pg : IGetFrame*
    ctypes.c_int,  # lPos : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('AVIFIL32.dll')
AVIStreamGetFrame = Fiddle::Function.new(
  lib['AVIStreamGetFrame'],
  [
    Fiddle::TYPE_VOIDP,  # pg : IGetFrame*
    Fiddle::TYPE_INT,  # lPos : INT
  ],
  Fiddle::TYPE_VOIDP)

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

$sig = @"
[DllImport("AVIFIL32.dll")]
public static extern IntPtr AVIStreamGetFrame(IntPtr pg, int lPos);
"@
$api = Add-Type -MemberDefinition $sig -Name 'AVIFIL32_AVIStreamGetFrame' -Namespace Win32 -PassThru
# $api::AVIStreamGetFrame(pg, lPos)

#uselib "AVIFIL32.dll"
#func global AVIStreamGetFrame "AVIStreamGetFrame" sptr, sptr
; AVIStreamGetFrame pg, lPos   ; 戻り値は stat
; pg : IGetFrame* -> "sptr"
; lPos : INT -> "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 AVIStreamGetFrame "AVIStreamGetFrame" sptr, int
; res = AVIStreamGetFrame(pg, lPos)
; pg : IGetFrame* -> "sptr"
; lPos : INT -> "int"

; void* AVIStreamGetFrame(IGetFrame* pg, INT lPos)
#uselib "AVIFIL32.dll"
#cfunc global AVIStreamGetFrame "AVIStreamGetFrame" intptr, int
; res = AVIStreamGetFrame(pg, lPos)
; pg : IGetFrame* -> "intptr"
; lPos : INT -> "int"

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

var (
	avifil32 = windows.NewLazySystemDLL("AVIFIL32.dll")
	procAVIStreamGetFrame = avifil32.NewProc("AVIStreamGetFrame")
)

// pg (IGetFrame*), lPos (INT)
r1, _, err := procAVIStreamGetFrame.Call(
	uintptr(pg),
	uintptr(lPos),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function AVIStreamGetFrame(
  pg: Pointer;   // IGetFrame*
  lPos: Integer   // INT
): Pointer; stdcall;
  external 'AVIFIL32.dll' name 'AVIStreamGetFrame';

result := DllCall("AVIFIL32\AVIStreamGetFrame"
    , "Ptr", pg   ; IGetFrame*
    , "Int", lPos   ; INT
    , "Ptr")   ; return: void*

●AVIStreamGetFrame(pg, lPos) = DLL("AVIFIL32.dll", "void* AVIStreamGetFrame(void*, int)")
# 呼び出し: AVIStreamGetFrame(pg, lPos)
# pg : IGetFrame* -> "void*"
# lPos : 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)。