MoCreateMediaType

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

HRESULT MoCreateMediaType(
    DMO_MEDIA_TYPE** ppmt,
    DWORD cbFormat
);

<DllImport("msdmo.dll", ExactSpelling:=True)>
Public Shared Function MoCreateMediaType(
    ppmt As IntPtr,   ' DMO_MEDIA_TYPE** in/out
    cbFormat As UInteger   ' DWORD
) As Integer
End Function

' ppmt : DMO_MEDIA_TYPE** in/out
' cbFormat : DWORD
Declare PtrSafe Function MoCreateMediaType Lib "msdmo" ( _
    ByVal ppmt As LongPtr, _
    ByVal cbFormat 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

MoCreateMediaType = ctypes.windll.msdmo.MoCreateMediaType
MoCreateMediaType.restype = ctypes.c_int
MoCreateMediaType.argtypes = [
    ctypes.c_void_p,  # ppmt : DMO_MEDIA_TYPE** in/out
    wintypes.DWORD,  # cbFormat : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msdmo.dll')
MoCreateMediaType = Fiddle::Function.new(
  lib['MoCreateMediaType'],
  [
    Fiddle::TYPE_VOIDP,  # ppmt : DMO_MEDIA_TYPE** in/out
    -Fiddle::TYPE_INT,  # cbFormat : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "msdmo")]
extern "system" {
    fn MoCreateMediaType(
        ppmt: *mut *mut DMO_MEDIA_TYPE,  // DMO_MEDIA_TYPE** in/out
        cbFormat: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msdmo.dll")]
public static extern int MoCreateMediaType(IntPtr ppmt, uint cbFormat);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msdmo_MoCreateMediaType' -Namespace Win32 -PassThru
# $api::MoCreateMediaType(ppmt, cbFormat)

#uselib "msdmo.dll"
#func global MoCreateMediaType "MoCreateMediaType" sptr, sptr
; MoCreateMediaType varptr(ppmt), cbFormat   ; 戻り値は stat
; ppmt : DMO_MEDIA_TYPE** in/out -> "sptr"
; cbFormat : DWORD -> "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 MoCreateMediaType "MoCreateMediaType" var, int
; res = MoCreateMediaType(ppmt, cbFormat)
; ppmt : DMO_MEDIA_TYPE** in/out -> "var"
; cbFormat : DWORD -> "int"
; ※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 MoCreateMediaType(DMO_MEDIA_TYPE** ppmt, DWORD cbFormat)
#uselib "msdmo.dll"
#cfunc global MoCreateMediaType "MoCreateMediaType" var, int
; res = MoCreateMediaType(ppmt, cbFormat)
; ppmt : DMO_MEDIA_TYPE** in/out -> "var"
; cbFormat : DWORD -> "int"
; ※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")
	procMoCreateMediaType = msdmo.NewProc("MoCreateMediaType")
)

// ppmt (DMO_MEDIA_TYPE** in/out), cbFormat (DWORD)
r1, _, err := procMoCreateMediaType.Call(
	uintptr(ppmt),
	uintptr(cbFormat),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MoCreateMediaType(
  ppmt: Pointer;   // DMO_MEDIA_TYPE** in/out
  cbFormat: DWORD   // DWORD
): Integer; stdcall;
  external 'msdmo.dll' name 'MoCreateMediaType';

result := DllCall("msdmo\MoCreateMediaType"
    , "Ptr", ppmt   ; DMO_MEDIA_TYPE** in/out
    , "UInt", cbFormat   ; DWORD
    , "Int")   ; return: HRESULT

●MoCreateMediaType(ppmt, cbFormat) = DLL("msdmo.dll", "int MoCreateMediaType(void*, dword)")
# 呼び出し: MoCreateMediaType(ppmt, cbFormat)
# ppmt : DMO_MEDIA_TYPE** in/out -> "void*"
# cbFormat : DWORD -> "dword"
# 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)。