MFStartup

関数

Media Foundationプラットフォームを初期化して起動する。

DLLMFPlat.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

HRESULT MFStartup(
    DWORD Version,
    DWORD dwFlags
);

パラメーター

名前	型	方向
Version	DWORD	in
dwFlags	DWORD	in

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFStartup(
    DWORD Version,
    DWORD dwFlags
);

[DllImport("MFPlat.dll", ExactSpelling = true)]
static extern int MFStartup(
    uint Version,   // DWORD
    uint dwFlags   // DWORD
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFStartup(
    Version As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' Version : DWORD
' dwFlags : DWORD
Declare PtrSafe Function MFStartup Lib "mfplat" ( _
    ByVal Version As Long, _
    ByVal dwFlags 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

MFStartup = ctypes.windll.mfplat.MFStartup
MFStartup.restype = ctypes.c_int
MFStartup.argtypes = [
    wintypes.DWORD,  # Version : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFStartup = Fiddle::Function.new(
  lib['MFStartup'],
  [
    -Fiddle::TYPE_INT,  # Version : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFStartup(
        Version: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFStartup(uint Version, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFStartup' -Namespace Win32 -PassThru
# $api::MFStartup(Version, dwFlags)

#uselib "MFPlat.dll"
#func global MFStartup "MFStartup" sptr, sptr
; MFStartup Version, dwFlags   ; 戻り値は stat
; Version : DWORD -> "sptr"
; dwFlags : 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 "MFPlat.dll"
#cfunc global MFStartup "MFStartup" int, int
; res = MFStartup(Version, dwFlags)
; Version : DWORD -> "int"
; dwFlags : DWORD -> "int"

; HRESULT MFStartup(DWORD Version, DWORD dwFlags)
#uselib "MFPlat.dll"
#cfunc global MFStartup "MFStartup" int, int
; res = MFStartup(Version, dwFlags)
; Version : DWORD -> "int"
; dwFlags : DWORD -> "int"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFStartup = mfplat.NewProc("MFStartup")
)

// Version (DWORD), dwFlags (DWORD)
r1, _, err := procMFStartup.Call(
	uintptr(Version),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFStartup(
  Version: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFStartup';

result := DllCall("MFPlat\MFStartup"
    , "UInt", Version   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●MFStartup(Version, dwFlags) = DLL("MFPlat.dll", "int MFStartup(dword, dword)")
# 呼び出し: MFStartup(Version, dwFlags)
# Version : DWORD -> "dword"
# dwFlags : 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)。