MoCopyMediaType

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

HRESULT MoCopyMediaType(
    DMO_MEDIA_TYPE* pmtDest,
    const DMO_MEDIA_TYPE* pmtSrc
);

<DllImport("msdmo.dll", ExactSpelling:=True)>
Public Shared Function MoCopyMediaType(
    pmtDest As IntPtr,   ' DMO_MEDIA_TYPE* in/out
    pmtSrc As IntPtr   ' DMO_MEDIA_TYPE*
) As Integer
End Function

' pmtDest : DMO_MEDIA_TYPE* in/out
' pmtSrc : DMO_MEDIA_TYPE*
Declare PtrSafe Function MoCopyMediaType Lib "msdmo" ( _
    ByVal pmtDest As LongPtr, _
    ByVal pmtSrc 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

MoCopyMediaType = ctypes.windll.msdmo.MoCopyMediaType
MoCopyMediaType.restype = ctypes.c_int
MoCopyMediaType.argtypes = [
    ctypes.c_void_p,  # pmtDest : DMO_MEDIA_TYPE* in/out
    ctypes.c_void_p,  # pmtSrc : DMO_MEDIA_TYPE*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msdmo.dll')
MoCopyMediaType = Fiddle::Function.new(
  lib['MoCopyMediaType'],
  [
    Fiddle::TYPE_VOIDP,  # pmtDest : DMO_MEDIA_TYPE* in/out
    Fiddle::TYPE_VOIDP,  # pmtSrc : DMO_MEDIA_TYPE*
  ],
  Fiddle::TYPE_INT)

#[link(name = "msdmo")]
extern "system" {
    fn MoCopyMediaType(
        pmtDest: *mut DMO_MEDIA_TYPE,  // DMO_MEDIA_TYPE* in/out
        pmtSrc: *const DMO_MEDIA_TYPE  // DMO_MEDIA_TYPE*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msdmo.dll")]
public static extern int MoCopyMediaType(IntPtr pmtDest, IntPtr pmtSrc);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msdmo_MoCopyMediaType' -Namespace Win32 -PassThru
# $api::MoCopyMediaType(pmtDest, pmtSrc)

#uselib "msdmo.dll"
#func global MoCopyMediaType "MoCopyMediaType" sptr, sptr
; MoCopyMediaType varptr(pmtDest), varptr(pmtSrc)   ; 戻り値は stat
; pmtDest : DMO_MEDIA_TYPE* in/out -> "sptr"
; pmtSrc : DMO_MEDIA_TYPE* -> "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 "msdmo.dll"
#cfunc global MoCopyMediaType "MoCopyMediaType" var, var
; res = MoCopyMediaType(pmtDest, pmtSrc)
; pmtDest : DMO_MEDIA_TYPE* in/out -> "var"
; pmtSrc : DMO_MEDIA_TYPE* -> "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 MoCopyMediaType(DMO_MEDIA_TYPE* pmtDest, DMO_MEDIA_TYPE* pmtSrc)
#uselib "msdmo.dll"
#cfunc global MoCopyMediaType "MoCopyMediaType" var, var
; res = MoCopyMediaType(pmtDest, pmtSrc)
; pmtDest : DMO_MEDIA_TYPE* in/out -> "var"
; pmtSrc : DMO_MEDIA_TYPE* -> "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 (
	msdmo = windows.NewLazySystemDLL("msdmo.dll")
	procMoCopyMediaType = msdmo.NewProc("MoCopyMediaType")
)

// pmtDest (DMO_MEDIA_TYPE* in/out), pmtSrc (DMO_MEDIA_TYPE*)
r1, _, err := procMoCopyMediaType.Call(
	uintptr(pmtDest),
	uintptr(pmtSrc),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MoCopyMediaType(
  pmtDest: Pointer;   // DMO_MEDIA_TYPE* in/out
  pmtSrc: Pointer   // DMO_MEDIA_TYPE*
): Integer; stdcall;
  external 'msdmo.dll' name 'MoCopyMediaType';

result := DllCall("msdmo\MoCopyMediaType"
    , "Ptr", pmtDest   ; DMO_MEDIA_TYPE* in/out
    , "Ptr", pmtSrc   ; DMO_MEDIA_TYPE*
    , "Int")   ; return: HRESULT

●MoCopyMediaType(pmtDest, pmtSrc) = DLL("msdmo.dll", "int MoCopyMediaType(void*, void*)")
# 呼び出し: MoCopyMediaType(pmtDest, pmtSrc)
# pmtDest : DMO_MEDIA_TYPE* in/out -> "void*"
# pmtSrc : DMO_MEDIA_TYPE* -> "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)。