SetCapture

// USER32.dll
#include <windows.h>

HWND SetCapture(
    HWND hWnd
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function SetCapture(
    hWnd As IntPtr   ' HWND
) As IntPtr
End Function

' hWnd : HWND
Declare PtrSafe Function SetCapture Lib "user32" ( _
    ByVal hWnd As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetCapture = ctypes.windll.user32.SetCapture
SetCapture.restype = ctypes.c_void_p
SetCapture.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SetCapture = Fiddle::Function.new(
  lib['SetCapture'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "user32")]
extern "system" {
    fn SetCapture(
        hWnd: *mut core::ffi::c_void  // HWND
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USER32.dll")]
public static extern IntPtr SetCapture(IntPtr hWnd);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SetCapture' -Namespace Win32 -PassThru
# $api::SetCapture(hWnd)

#uselib "USER32.dll"
#func global SetCapture "SetCapture" sptr
; SetCapture hWnd   ; 戻り値は stat
; hWnd : HWND -> "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 "USER32.dll"
#cfunc global SetCapture "SetCapture" sptr
; res = SetCapture(hWnd)
; hWnd : HWND -> "sptr"

; HWND SetCapture(HWND hWnd)
#uselib "USER32.dll"
#cfunc global SetCapture "SetCapture" intptr
; res = SetCapture(hWnd)
; hWnd : HWND -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procSetCapture = user32.NewProc("SetCapture")
)

// hWnd (HWND)
r1, _, err := procSetCapture.Call(
	uintptr(hWnd),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HWND

function SetCapture(
  hWnd: THandle   // HWND
): THandle; stdcall;
  external 'USER32.dll' name 'SetCapture';

result := DllCall("USER32\SetCapture"
    , "Ptr", hWnd   ; HWND
    , "Ptr")   ; return: HWND

●SetCapture(hWnd) = DLL("USER32.dll", "void* SetCapture(void*)")
# 呼び出し: SetCapture(hWnd)
# hWnd : HWND -> "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)。

const std = @import("std");

extern "user32" fn SetCapture(
    hWnd: ?*anyopaque // HWND
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc SetCapture(
    hWnd: pointer  # HWND
): pointer {.importc: "SetCapture", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
void* SetCapture(
    void* hWnd   // HWND
);

ccall((:SetCapture, "USER32.dll"), stdcall, Ptr{Cvoid},
      (Ptr{Cvoid},),
      hWnd)
# hWnd : HWND -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* SetCapture(
    void* hWnd);
]]
local user32 = ffi.load("user32")
-- user32.SetCapture(hWnd)
-- hWnd : HWND
-- 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('USER32.dll');
const SetCapture = lib.func('__stdcall', 'SetCapture', 'void *', ['void *']);
// SetCapture(hWnd)
// hWnd : HWND -> 'void *'
// 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("USER32.dll", {
  SetCapture: { parameters: ["pointer"], result: "pointer" },
});
// lib.symbols.SetCapture(hWnd)
// hWnd : HWND -> "pointer"
// 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
void* SetCapture(
    void* hWnd);
C, "USER32.dll");
// $ffi->SetCapture(hWnd);
// hWnd : HWND
// 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 User32 extends StdCallLibrary {
    User32 INSTANCE = Native.load("user32", User32.class);
    Pointer SetCapture(
        Pointer hWnd   // HWND
    );
}

@[Link("user32")]
lib LibUSER32
  fun SetCapture = SetCapture(
    hWnd : Void*   # HWND
  ) : Void*
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 SetCaptureNative = Pointer<Void> Function(Pointer<Void>);
typedef SetCaptureDart = Pointer<Void> Function(Pointer<Void>);
final SetCapture = DynamicLibrary.open('USER32.dll')
    .lookupFunction<SetCaptureNative, SetCaptureDart>('SetCapture');
// hWnd : HWND -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SetCapture(
  hWnd: THandle   // HWND
): THandle; stdcall;
  external 'USER32.dll' name 'SetCapture';

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

foreign import stdcall safe "SetCapture"
  c_SetCapture :: Ptr () -> IO (Ptr ())
-- hWnd : HWND -> Ptr ()
-- 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 setcapture =
  foreign "SetCapture"
    ((ptr void) @-> returning (ptr void))
(* hWnd : HWND -> (ptr void) *)
(* 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 user32 (t "USER32.dll"))
(cffi:use-foreign-library user32)

(cffi:defcfun ("SetCapture" set-capture :convention :stdcall) :pointer
  (h-wnd :pointer))   ; HWND
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SetCapture = Win32::API::More->new('USER32',
    'HANDLE SetCapture(HANDLE hWnd)');
# my $ret = $SetCapture->Call($hWnd);
# hWnd : HWND -> HANDLE
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。