ホーム › Media.MediaFoundation › MFCancelWorkItem

MFCancelWorkItem

関数

スケジュール済みの作業項目をキーで指定してキャンセルする。

DLLMFPlat.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

HRESULT MFCancelWorkItem(
    ULONGLONG Key
);

パラメーター

名前	型	方向
Key	ULONGLONG	in

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFCancelWorkItem(
    ULONGLONG Key
);

[DllImport("MFPlat.dll", ExactSpelling = true)]
static extern int MFCancelWorkItem(
    ulong Key   // ULONGLONG
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCancelWorkItem(
    Key As ULong   ' ULONGLONG
) As Integer
End Function

' Key : ULONGLONG
Declare PtrSafe Function MFCancelWorkItem Lib "mfplat" ( _
    ByVal Key As LongLong) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MFCancelWorkItem = ctypes.windll.mfplat.MFCancelWorkItem
MFCancelWorkItem.restype = ctypes.c_int
MFCancelWorkItem.argtypes = [
    ctypes.c_ulonglong,  # Key : ULONGLONG
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCancelWorkItem = Fiddle::Function.new(
  lib['MFCancelWorkItem'],
  [
    -Fiddle::TYPE_LONG_LONG,  # Key : ULONGLONG
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCancelWorkItem(
        Key: u64  // ULONGLONG
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFCancelWorkItem(ulong Key);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCancelWorkItem' -Namespace Win32 -PassThru
# $api::MFCancelWorkItem(Key)

#uselib "MFPlat.dll"
#func global MFCancelWorkItem "MFCancelWorkItem" sptr
; MFCancelWorkItem Key   ; 戻り値は stat
; Key : ULONGLONG -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 MFCancelWorkItem "MFCancelWorkItem" int64
; res = MFCancelWorkItem(Key)
; Key : ULONGLONG -> "int64"
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; HRESULT MFCancelWorkItem(ULONGLONG Key)
#uselib "MFPlat.dll"
#cfunc global MFCancelWorkItem "MFCancelWorkItem" int64
; res = MFCancelWorkItem(Key)
; Key : ULONGLONG -> "int64"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCancelWorkItem = mfplat.NewProc("MFCancelWorkItem")
)

// Key (ULONGLONG)
r1, _, err := procMFCancelWorkItem.Call(
	uintptr(Key),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCancelWorkItem(
  Key: UInt64   // ULONGLONG
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCancelWorkItem';

result := DllCall("MFPlat\MFCancelWorkItem"
    , "Int64", Key   ; ULONGLONG
    , "Int")   ; return: HRESULT

●MFCancelWorkItem(Key) = DLL("MFPlat.dll", "int MFCancelWorkItem(qword)")
# 呼び出し: MFCancelWorkItem(Key)
# Key : ULONGLONG -> "qword"
# 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)。