DwmSetDxFrameDuration

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

HRESULT DwmSetDxFrameDuration(
    HWND hwnd,
    INT cRefreshes
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmSetDxFrameDuration(
    hwnd As IntPtr,   ' HWND
    cRefreshes As Integer   ' INT
) As Integer
End Function

' hwnd : HWND
' cRefreshes : INT
Declare PtrSafe Function DwmSetDxFrameDuration Lib "dwmapi" ( _
    ByVal hwnd As LongPtr, _
    ByVal cRefreshes As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DwmSetDxFrameDuration = ctypes.windll.dwmapi.DwmSetDxFrameDuration
DwmSetDxFrameDuration.restype = ctypes.c_int
DwmSetDxFrameDuration.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    ctypes.c_int,  # cRefreshes : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmSetDxFrameDuration = Fiddle::Function.new(
  lib['DwmSetDxFrameDuration'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_INT,  # cRefreshes : INT
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "dwmapi.dll"
#func global DwmSetDxFrameDuration "DwmSetDxFrameDuration" sptr, sptr
; DwmSetDxFrameDuration hwnd, cRefreshes   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; cRefreshes : INT -> "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 DwmSetDxFrameDuration "DwmSetDxFrameDuration" sptr, int
; res = DwmSetDxFrameDuration(hwnd, cRefreshes)
; hwnd : HWND -> "sptr"
; cRefreshes : INT -> "int"

; HRESULT DwmSetDxFrameDuration(HWND hwnd, INT cRefreshes)
#uselib "dwmapi.dll"
#cfunc global DwmSetDxFrameDuration "DwmSetDxFrameDuration" intptr, int
; res = DwmSetDxFrameDuration(hwnd, cRefreshes)
; hwnd : HWND -> "intptr"
; cRefreshes : INT -> "int"

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

var (
	dwmapi = windows.NewLazySystemDLL("dwmapi.dll")
	procDwmSetDxFrameDuration = dwmapi.NewProc("DwmSetDxFrameDuration")
)

// hwnd (HWND), cRefreshes (INT)
r1, _, err := procDwmSetDxFrameDuration.Call(
	uintptr(hwnd),
	uintptr(cRefreshes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmSetDxFrameDuration(
  hwnd: THandle;   // HWND
  cRefreshes: Integer   // INT
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmSetDxFrameDuration';

result := DllCall("dwmapi\DwmSetDxFrameDuration"
    , "Ptr", hwnd   ; HWND
    , "Int", cRefreshes   ; INT
    , "Int")   ; return: HRESULT

●DwmSetDxFrameDuration(hwnd, cRefreshes) = DLL("dwmapi.dll", "int DwmSetDxFrameDuration(void*, int)")
# 呼び出し: DwmSetDxFrameDuration(hwnd, cRefreshes)
# hwnd : HWND -> "void*"
# cRefreshes : INT -> "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)。

const std = @import("std");

extern "dwmapi" fn DwmSetDxFrameDuration(
    hwnd: ?*anyopaque, // HWND
    cRefreshes: i32 // INT
) callconv(std.os.windows.WINAPI) i32;

proc DwmSetDxFrameDuration(
    hwnd: pointer,  # HWND
    cRefreshes: int32  # INT
): int32 {.importc: "DwmSetDxFrameDuration", stdcall, dynlib: "dwmapi.dll".}

pragma(lib, "dwmapi");
extern(Windows)
int DwmSetDxFrameDuration(
    void* hwnd,   // HWND
    int cRefreshes   // INT
);

ccall((:DwmSetDxFrameDuration, "dwmapi.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Int32),
      hwnd, cRefreshes)
# hwnd : HWND -> Ptr{Cvoid}
# cRefreshes : INT -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DwmSetDxFrameDuration(
    void* hwnd,
    int32_t cRefreshes);
]]
local dwmapi = ffi.load("dwmapi")
-- dwmapi.DwmSetDxFrameDuration(hwnd, cRefreshes)
-- hwnd : HWND
-- cRefreshes : INT
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('dwmapi.dll');
const DwmSetDxFrameDuration = lib.func('__stdcall', 'DwmSetDxFrameDuration', 'int32_t', ['void *', 'int32_t']);
// DwmSetDxFrameDuration(hwnd, cRefreshes)
// hwnd : HWND -> 'void *'
// cRefreshes : INT -> 'int32_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("dwmapi.dll", {
  DwmSetDxFrameDuration: { parameters: ["pointer", "i32"], result: "i32" },
});
// lib.symbols.DwmSetDxFrameDuration(hwnd, cRefreshes)
// hwnd : HWND -> "pointer"
// cRefreshes : INT -> "i32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t DwmSetDxFrameDuration(
    void* hwnd,
    int32_t cRefreshes);
C, "dwmapi.dll");
// $ffi->DwmSetDxFrameDuration(hwnd, cRefreshes);
// hwnd : HWND
// cRefreshes : INT
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Dwmapi extends StdCallLibrary {
    Dwmapi INSTANCE = Native.load("dwmapi", Dwmapi.class);
    int DwmSetDxFrameDuration(
        Pointer hwnd,   // HWND
        int cRefreshes   // INT
    );
}

@[Link("dwmapi")]
lib Libdwmapi
  fun DwmSetDxFrameDuration = DwmSetDxFrameDuration(
    hwnd : Void*,   # HWND
    cRefreshes : Int32   # INT
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef DwmSetDxFrameDurationNative = Int32 Function(Pointer<Void>, Int32);
typedef DwmSetDxFrameDurationDart = int Function(Pointer<Void>, int);
final DwmSetDxFrameDuration = DynamicLibrary.open('dwmapi.dll')
    .lookupFunction<DwmSetDxFrameDurationNative, DwmSetDxFrameDurationDart>('DwmSetDxFrameDuration');
// hwnd : HWND -> Pointer<Void>
// cRefreshes : INT -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DwmSetDxFrameDuration(
  hwnd: THandle;   // HWND
  cRefreshes: Integer   // INT
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmSetDxFrameDuration';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DwmSetDxFrameDuration"
  c_DwmSetDxFrameDuration :: Ptr () -> Int32 -> IO Int32
-- hwnd : HWND -> Ptr ()
-- cRefreshes : INT -> Int32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let dwmsetdxframeduration =
  foreign "DwmSetDxFrameDuration"
    ((ptr void) @-> int32_t @-> returning int32_t)
(* hwnd : HWND -> (ptr void) *)
(* cRefreshes : INT -> int32_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library dwmapi (t "dwmapi.dll"))
(cffi:use-foreign-library dwmapi)

(cffi:defcfun ("DwmSetDxFrameDuration" dwm-set-dx-frame-duration :convention :stdcall) :int32
  (hwnd :pointer)   ; HWND
  (c-refreshes :int32))   ; INT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DwmSetDxFrameDuration = Win32::API::More->new('dwmapi',
    'int DwmSetDxFrameDuration(HANDLE hwnd, int cRefreshes)');
# my $ret = $DwmSetDxFrameDuration->Call($hwnd, $cRefreshes);
# hwnd : HWND -> HANDLE
# cRefreshes : INT -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。