DMOUnregister

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

HRESULT DMOUnregister(
    const GUID* clsidDMO,
    const GUID* guidCategory
);

<DllImport("msdmo.dll", ExactSpelling:=True)>
Public Shared Function DMOUnregister(
    ByRef clsidDMO As Guid,   ' GUID*
    ByRef guidCategory As Guid   ' GUID*
) As Integer
End Function

' clsidDMO : GUID*
' guidCategory : GUID*
Declare PtrSafe Function DMOUnregister Lib "msdmo" ( _
    ByVal clsidDMO As LongPtr, _
    ByVal guidCategory 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

DMOUnregister = ctypes.windll.msdmo.DMOUnregister
DMOUnregister.restype = ctypes.c_int
DMOUnregister.argtypes = [
    ctypes.c_void_p,  # clsidDMO : GUID*
    ctypes.c_void_p,  # guidCategory : GUID*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msdmo.dll')
DMOUnregister = Fiddle::Function.new(
  lib['DMOUnregister'],
  [
    Fiddle::TYPE_VOIDP,  # clsidDMO : GUID*
    Fiddle::TYPE_VOIDP,  # guidCategory : GUID*
  ],
  Fiddle::TYPE_INT)

#[link(name = "msdmo")]
extern "system" {
    fn DMOUnregister(
        clsidDMO: *const GUID,  // GUID*
        guidCategory: *const GUID  // GUID*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msdmo.dll")]
public static extern int DMOUnregister(ref Guid clsidDMO, ref Guid guidCategory);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msdmo_DMOUnregister' -Namespace Win32 -PassThru
# $api::DMOUnregister(clsidDMO, guidCategory)

#uselib "msdmo.dll"
#func global DMOUnregister "DMOUnregister" sptr, sptr
; DMOUnregister varptr(clsidDMO), varptr(guidCategory)   ; 戻り値は stat
; clsidDMO : GUID* -> "sptr"
; guidCategory : GUID* -> "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 DMOUnregister "DMOUnregister" var, var
; res = DMOUnregister(clsidDMO, guidCategory)
; clsidDMO : GUID* -> "var"
; guidCategory : GUID* -> "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 DMOUnregister(GUID* clsidDMO, GUID* guidCategory)
#uselib "msdmo.dll"
#cfunc global DMOUnregister "DMOUnregister" var, var
; res = DMOUnregister(clsidDMO, guidCategory)
; clsidDMO : GUID* -> "var"
; guidCategory : GUID* -> "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 (
	msdmo = windows.NewLazySystemDLL("msdmo.dll")
	procDMOUnregister = msdmo.NewProc("DMOUnregister")
)

// clsidDMO (GUID*), guidCategory (GUID*)
r1, _, err := procDMOUnregister.Call(
	uintptr(clsidDMO),
	uintptr(guidCategory),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DMOUnregister(
  clsidDMO: PGUID;   // GUID*
  guidCategory: PGUID   // GUID*
): Integer; stdcall;
  external 'msdmo.dll' name 'DMOUnregister';

result := DllCall("msdmo\DMOUnregister"
    , "Ptr", clsidDMO   ; GUID*
    , "Ptr", guidCategory   ; GUID*
    , "Int")   ; return: HRESULT

●DMOUnregister(clsidDMO, guidCategory) = DLL("msdmo.dll", "int DMOUnregister(void*, void*)")
# 呼び出し: DMOUnregister(clsidDMO, guidCategory)
# clsidDMO : GUID* -> "void*"
# guidCategory : GUID* -> "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)。