DwmUnregisterThumbnail

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

HRESULT DwmUnregisterThumbnail(
    INT_PTR hThumbnailId
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmUnregisterThumbnail(
    hThumbnailId As IntPtr   ' INT_PTR
) As Integer
End Function

' hThumbnailId : INT_PTR
Declare PtrSafe Function DwmUnregisterThumbnail Lib "dwmapi" ( _
    ByVal hThumbnailId 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

DwmUnregisterThumbnail = ctypes.windll.dwmapi.DwmUnregisterThumbnail
DwmUnregisterThumbnail.restype = ctypes.c_int
DwmUnregisterThumbnail.argtypes = [
    ctypes.c_ssize_t,  # hThumbnailId : INT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmUnregisterThumbnail = Fiddle::Function.new(
  lib['DwmUnregisterThumbnail'],
  [
    Fiddle::TYPE_INTPTR_T,  # hThumbnailId : INT_PTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmUnregisterThumbnail(
        hThumbnailId: isize  // INT_PTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dwmapi.dll")]
public static extern int DwmUnregisterThumbnail(IntPtr hThumbnailId);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dwmapi_DwmUnregisterThumbnail' -Namespace Win32 -PassThru
# $api::DwmUnregisterThumbnail(hThumbnailId)

#uselib "dwmapi.dll"
#func global DwmUnregisterThumbnail "DwmUnregisterThumbnail" sptr
; DwmUnregisterThumbnail hThumbnailId   ; 戻り値は stat
; hThumbnailId : INT_PTR -> "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 "dwmapi.dll"
#cfunc global DwmUnregisterThumbnail "DwmUnregisterThumbnail" sptr
; res = DwmUnregisterThumbnail(hThumbnailId)
; hThumbnailId : INT_PTR -> "sptr"

; HRESULT DwmUnregisterThumbnail(INT_PTR hThumbnailId)
#uselib "dwmapi.dll"
#cfunc global DwmUnregisterThumbnail "DwmUnregisterThumbnail" intptr
; res = DwmUnregisterThumbnail(hThumbnailId)
; hThumbnailId : INT_PTR -> "intptr"

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

var (
	dwmapi = windows.NewLazySystemDLL("dwmapi.dll")
	procDwmUnregisterThumbnail = dwmapi.NewProc("DwmUnregisterThumbnail")
)

// hThumbnailId (INT_PTR)
r1, _, err := procDwmUnregisterThumbnail.Call(
	uintptr(hThumbnailId),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmUnregisterThumbnail(
  hThumbnailId: NativeInt   // INT_PTR
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmUnregisterThumbnail';

result := DllCall("dwmapi\DwmUnregisterThumbnail"
    , "Ptr", hThumbnailId   ; INT_PTR
    , "Int")   ; return: HRESULT

●DwmUnregisterThumbnail(hThumbnailId) = DLL("dwmapi.dll", "int DwmUnregisterThumbnail(int)")
# 呼び出し: DwmUnregisterThumbnail(hThumbnailId)
# hThumbnailId : INT_PTR -> "int"
# 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)。