MFPutWaitingWorkItem

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

HRESULT MFPutWaitingWorkItem(
    HANDLE hEvent,
    INT Priority,
    IMFAsyncResult* pResult,
    ULONGLONG* pKey   // optional
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFPutWaitingWorkItem(
    hEvent As IntPtr,   ' HANDLE
    Priority As Integer,   ' INT
    pResult As IntPtr,   ' IMFAsyncResult*
    pKey As IntPtr   ' ULONGLONG* optional, out
) As Integer
End Function

' hEvent : HANDLE
' Priority : INT
' pResult : IMFAsyncResult*
' pKey : ULONGLONG* optional, out
Declare PtrSafe Function MFPutWaitingWorkItem Lib "mfplat" ( _
    ByVal hEvent As LongPtr, _
    ByVal Priority As Long, _
    ByVal pResult As LongPtr, _
    ByVal pKey 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

MFPutWaitingWorkItem = ctypes.windll.mfplat.MFPutWaitingWorkItem
MFPutWaitingWorkItem.restype = ctypes.c_int
MFPutWaitingWorkItem.argtypes = [
    wintypes.HANDLE,  # hEvent : HANDLE
    ctypes.c_int,  # Priority : INT
    ctypes.c_void_p,  # pResult : IMFAsyncResult*
    ctypes.POINTER(ctypes.c_ulonglong),  # pKey : ULONGLONG* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFPutWaitingWorkItem = Fiddle::Function.new(
  lib['MFPutWaitingWorkItem'],
  [
    Fiddle::TYPE_VOIDP,  # hEvent : HANDLE
    Fiddle::TYPE_INT,  # Priority : INT
    Fiddle::TYPE_VOIDP,  # pResult : IMFAsyncResult*
    Fiddle::TYPE_VOIDP,  # pKey : ULONGLONG* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFPutWaitingWorkItem(
        hEvent: *mut core::ffi::c_void,  // HANDLE
        Priority: i32,  // INT
        pResult: *mut core::ffi::c_void,  // IMFAsyncResult*
        pKey: *mut u64  // ULONGLONG* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFPutWaitingWorkItem(IntPtr hEvent, int Priority, IntPtr pResult, IntPtr pKey);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFPutWaitingWorkItem' -Namespace Win32 -PassThru
# $api::MFPutWaitingWorkItem(hEvent, Priority, pResult, pKey)

#uselib "MFPlat.dll"
#func global MFPutWaitingWorkItem "MFPutWaitingWorkItem" sptr, sptr, sptr, sptr
; MFPutWaitingWorkItem hEvent, Priority, pResult, varptr(pKey)   ; 戻り値は stat
; hEvent : HANDLE -> "sptr"
; Priority : INT -> "sptr"
; pResult : IMFAsyncResult* -> "sptr"
; pKey : ULONGLONG* optional, out -> "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 MFPutWaitingWorkItem "MFPutWaitingWorkItem" sptr, int, sptr, var
; res = MFPutWaitingWorkItem(hEvent, Priority, pResult, pKey)
; hEvent : HANDLE -> "sptr"
; Priority : INT -> "int"
; pResult : IMFAsyncResult* -> "sptr"
; pKey : ULONGLONG* optional, out -> "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 MFPutWaitingWorkItem(HANDLE hEvent, INT Priority, IMFAsyncResult* pResult, ULONGLONG* pKey)
#uselib "MFPlat.dll"
#cfunc global MFPutWaitingWorkItem "MFPutWaitingWorkItem" intptr, int, intptr, var
; res = MFPutWaitingWorkItem(hEvent, Priority, pResult, pKey)
; hEvent : HANDLE -> "intptr"
; Priority : INT -> "int"
; pResult : IMFAsyncResult* -> "intptr"
; pKey : ULONGLONG* optional, out -> "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 (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFPutWaitingWorkItem = mfplat.NewProc("MFPutWaitingWorkItem")
)

// hEvent (HANDLE), Priority (INT), pResult (IMFAsyncResult*), pKey (ULONGLONG* optional, out)
r1, _, err := procMFPutWaitingWorkItem.Call(
	uintptr(hEvent),
	uintptr(Priority),
	uintptr(pResult),
	uintptr(pKey),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFPutWaitingWorkItem(
  hEvent: THandle;   // HANDLE
  Priority: Integer;   // INT
  pResult: Pointer;   // IMFAsyncResult*
  pKey: Pointer   // ULONGLONG* optional, out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFPutWaitingWorkItem';

result := DllCall("MFPlat\MFPutWaitingWorkItem"
    , "Ptr", hEvent   ; HANDLE
    , "Int", Priority   ; INT
    , "Ptr", pResult   ; IMFAsyncResult*
    , "Ptr", pKey   ; ULONGLONG* optional, out
    , "Int")   ; return: HRESULT

●MFPutWaitingWorkItem(hEvent, Priority, pResult, pKey) = DLL("MFPlat.dll", "int MFPutWaitingWorkItem(void*, int, void*, void*)")
# 呼び出し: MFPutWaitingWorkItem(hEvent, Priority, pResult, pKey)
# hEvent : HANDLE -> "void*"
# Priority : INT -> "int"
# pResult : IMFAsyncResult* -> "void*"
# pKey : ULONGLONG* optional, out -> "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)。