DwmGetCompositionTimingInfo

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

HRESULT DwmGetCompositionTimingInfo(
    HWND hwnd,
    DWM_TIMING_INFO* pTimingInfo
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmGetCompositionTimingInfo(
    hwnd As IntPtr,   ' HWND
    pTimingInfo As IntPtr   ' DWM_TIMING_INFO* out
) As Integer
End Function

' hwnd : HWND
' pTimingInfo : DWM_TIMING_INFO* out
Declare PtrSafe Function DwmGetCompositionTimingInfo Lib "dwmapi" ( _
    ByVal hwnd As LongPtr, _
    ByVal pTimingInfo 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

DwmGetCompositionTimingInfo = ctypes.windll.dwmapi.DwmGetCompositionTimingInfo
DwmGetCompositionTimingInfo.restype = ctypes.c_int
DwmGetCompositionTimingInfo.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    ctypes.c_void_p,  # pTimingInfo : DWM_TIMING_INFO* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmGetCompositionTimingInfo = Fiddle::Function.new(
  lib['DwmGetCompositionTimingInfo'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_VOIDP,  # pTimingInfo : DWM_TIMING_INFO* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmGetCompositionTimingInfo(
        hwnd: *mut core::ffi::c_void,  // HWND
        pTimingInfo: *mut DWM_TIMING_INFO  // DWM_TIMING_INFO* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "dwmapi.dll"
#func global DwmGetCompositionTimingInfo "DwmGetCompositionTimingInfo" sptr, sptr
; DwmGetCompositionTimingInfo hwnd, varptr(pTimingInfo)   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; pTimingInfo : DWM_TIMING_INFO* 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 DwmGetCompositionTimingInfo "DwmGetCompositionTimingInfo" sptr, var
; res = DwmGetCompositionTimingInfo(hwnd, pTimingInfo)
; hwnd : HWND -> "sptr"
; pTimingInfo : DWM_TIMING_INFO* 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 DwmGetCompositionTimingInfo(HWND hwnd, DWM_TIMING_INFO* pTimingInfo)
#uselib "dwmapi.dll"
#cfunc global DwmGetCompositionTimingInfo "DwmGetCompositionTimingInfo" intptr, var
; res = DwmGetCompositionTimingInfo(hwnd, pTimingInfo)
; hwnd : HWND -> "intptr"
; pTimingInfo : DWM_TIMING_INFO* 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")
	procDwmGetCompositionTimingInfo = dwmapi.NewProc("DwmGetCompositionTimingInfo")
)

// hwnd (HWND), pTimingInfo (DWM_TIMING_INFO* out)
r1, _, err := procDwmGetCompositionTimingInfo.Call(
	uintptr(hwnd),
	uintptr(pTimingInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmGetCompositionTimingInfo(
  hwnd: THandle;   // HWND
  pTimingInfo: Pointer   // DWM_TIMING_INFO* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmGetCompositionTimingInfo';

result := DllCall("dwmapi\DwmGetCompositionTimingInfo"
    , "Ptr", hwnd   ; HWND
    , "Ptr", pTimingInfo   ; DWM_TIMING_INFO* out
    , "Int")   ; return: HRESULT

●DwmGetCompositionTimingInfo(hwnd, pTimingInfo) = DLL("dwmapi.dll", "int DwmGetCompositionTimingInfo(void*, void*)")
# 呼び出し: DwmGetCompositionTimingInfo(hwnd, pTimingInfo)
# hwnd : HWND -> "void*"
# pTimingInfo : DWM_TIMING_INFO* 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)。