MFPutWorkItem

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

HRESULT MFPutWorkItem(
    DWORD dwQueue,
    IMFAsyncCallback* pCallback,
    IUnknown* pState
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFPutWorkItem(
    dwQueue As UInteger,   ' DWORD
    pCallback As IntPtr,   ' IMFAsyncCallback*
    pState As IntPtr   ' IUnknown*
) As Integer
End Function

' dwQueue : DWORD
' pCallback : IMFAsyncCallback*
' pState : IUnknown*
Declare PtrSafe Function MFPutWorkItem Lib "mfplat" ( _
    ByVal dwQueue As Long, _
    ByVal pCallback As LongPtr, _
    ByVal pState 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

MFPutWorkItem = ctypes.windll.mfplat.MFPutWorkItem
MFPutWorkItem.restype = ctypes.c_int
MFPutWorkItem.argtypes = [
    wintypes.DWORD,  # dwQueue : DWORD
    ctypes.c_void_p,  # pCallback : IMFAsyncCallback*
    ctypes.c_void_p,  # pState : IUnknown*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFPutWorkItem = Fiddle::Function.new(
  lib['MFPutWorkItem'],
  [
    -Fiddle::TYPE_INT,  # dwQueue : DWORD
    Fiddle::TYPE_VOIDP,  # pCallback : IMFAsyncCallback*
    Fiddle::TYPE_VOIDP,  # pState : IUnknown*
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFPutWorkItem(
        dwQueue: u32,  // DWORD
        pCallback: *mut core::ffi::c_void,  // IMFAsyncCallback*
        pState: *mut core::ffi::c_void  // IUnknown*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFPutWorkItem(uint dwQueue, IntPtr pCallback, IntPtr pState);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFPutWorkItem' -Namespace Win32 -PassThru
# $api::MFPutWorkItem(dwQueue, pCallback, pState)

#uselib "MFPlat.dll"
#func global MFPutWorkItem "MFPutWorkItem" sptr, sptr, sptr
; MFPutWorkItem dwQueue, pCallback, pState   ; 戻り値は stat
; dwQueue : DWORD -> "sptr"
; pCallback : IMFAsyncCallback* -> "sptr"
; pState : IUnknown* -> "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 MFPutWorkItem "MFPutWorkItem" int, sptr, sptr
; res = MFPutWorkItem(dwQueue, pCallback, pState)
; dwQueue : DWORD -> "int"
; pCallback : IMFAsyncCallback* -> "sptr"
; pState : IUnknown* -> "sptr"

; HRESULT MFPutWorkItem(DWORD dwQueue, IMFAsyncCallback* pCallback, IUnknown* pState)
#uselib "MFPlat.dll"
#cfunc global MFPutWorkItem "MFPutWorkItem" int, intptr, intptr
; res = MFPutWorkItem(dwQueue, pCallback, pState)
; dwQueue : DWORD -> "int"
; pCallback : IMFAsyncCallback* -> "intptr"
; pState : IUnknown* -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFPutWorkItem = mfplat.NewProc("MFPutWorkItem")
)

// dwQueue (DWORD), pCallback (IMFAsyncCallback*), pState (IUnknown*)
r1, _, err := procMFPutWorkItem.Call(
	uintptr(dwQueue),
	uintptr(pCallback),
	uintptr(pState),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFPutWorkItem(
  dwQueue: DWORD;   // DWORD
  pCallback: Pointer;   // IMFAsyncCallback*
  pState: Pointer   // IUnknown*
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFPutWorkItem';

result := DllCall("MFPlat\MFPutWorkItem"
    , "UInt", dwQueue   ; DWORD
    , "Ptr", pCallback   ; IMFAsyncCallback*
    , "Ptr", pState   ; IUnknown*
    , "Int")   ; return: HRESULT

●MFPutWorkItem(dwQueue, pCallback, pState) = DLL("MFPlat.dll", "int MFPutWorkItem(dword, void*, void*)")
# 呼び出し: MFPutWorkItem(dwQueue, pCallback, pState)
# dwQueue : DWORD -> "dword"
# pCallback : IMFAsyncCallback* -> "void*"
# pState : IUnknown* -> "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)。