DwmQueryThumbnailSourceSize

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

HRESULT DwmQueryThumbnailSourceSize(
    INT_PTR hThumbnail,
    SIZE* pSize
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmQueryThumbnailSourceSize(
    hThumbnail As IntPtr,   ' INT_PTR
    pSize As IntPtr   ' SIZE* out
) As Integer
End Function

' hThumbnail : INT_PTR
' pSize : SIZE* out
Declare PtrSafe Function DwmQueryThumbnailSourceSize Lib "dwmapi" ( _
    ByVal hThumbnail As LongPtr, _
    ByVal pSize 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

DwmQueryThumbnailSourceSize = ctypes.windll.dwmapi.DwmQueryThumbnailSourceSize
DwmQueryThumbnailSourceSize.restype = ctypes.c_int
DwmQueryThumbnailSourceSize.argtypes = [
    ctypes.c_ssize_t,  # hThumbnail : INT_PTR
    ctypes.c_void_p,  # pSize : SIZE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmQueryThumbnailSourceSize = Fiddle::Function.new(
  lib['DwmQueryThumbnailSourceSize'],
  [
    Fiddle::TYPE_INTPTR_T,  # hThumbnail : INT_PTR
    Fiddle::TYPE_VOIDP,  # pSize : SIZE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmQueryThumbnailSourceSize(
        hThumbnail: isize,  // INT_PTR
        pSize: *mut SIZE  // SIZE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dwmapi.dll")]
public static extern int DwmQueryThumbnailSourceSize(IntPtr hThumbnail, IntPtr pSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dwmapi_DwmQueryThumbnailSourceSize' -Namespace Win32 -PassThru
# $api::DwmQueryThumbnailSourceSize(hThumbnail, pSize)

#uselib "dwmapi.dll"
#func global DwmQueryThumbnailSourceSize "DwmQueryThumbnailSourceSize" sptr, sptr
; DwmQueryThumbnailSourceSize hThumbnail, varptr(pSize)   ; 戻り値は stat
; hThumbnail : INT_PTR -> "sptr"
; pSize : SIZE* 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 "dwmapi.dll"
#cfunc global DwmQueryThumbnailSourceSize "DwmQueryThumbnailSourceSize" sptr, var
; res = DwmQueryThumbnailSourceSize(hThumbnail, pSize)
; hThumbnail : INT_PTR -> "sptr"
; pSize : SIZE* 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 DwmQueryThumbnailSourceSize(INT_PTR hThumbnail, SIZE* pSize)
#uselib "dwmapi.dll"
#cfunc global DwmQueryThumbnailSourceSize "DwmQueryThumbnailSourceSize" intptr, var
; res = DwmQueryThumbnailSourceSize(hThumbnail, pSize)
; hThumbnail : INT_PTR -> "intptr"
; pSize : SIZE* 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 (
	dwmapi = windows.NewLazySystemDLL("dwmapi.dll")
	procDwmQueryThumbnailSourceSize = dwmapi.NewProc("DwmQueryThumbnailSourceSize")
)

// hThumbnail (INT_PTR), pSize (SIZE* out)
r1, _, err := procDwmQueryThumbnailSourceSize.Call(
	uintptr(hThumbnail),
	uintptr(pSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmQueryThumbnailSourceSize(
  hThumbnail: NativeInt;   // INT_PTR
  pSize: Pointer   // SIZE* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmQueryThumbnailSourceSize';

result := DllCall("dwmapi\DwmQueryThumbnailSourceSize"
    , "Ptr", hThumbnail   ; INT_PTR
    , "Ptr", pSize   ; SIZE* out
    , "Int")   ; return: HRESULT

●DwmQueryThumbnailSourceSize(hThumbnail, pSize) = DLL("dwmapi.dll", "int DwmQueryThumbnailSourceSize(int, void*)")
# 呼び出し: DwmQueryThumbnailSourceSize(hThumbnail, pSize)
# hThumbnail : INT_PTR -> "int"
# pSize : SIZE* 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)。