CreatePolygonRgn

// GDI32.dll
#include <windows.h>

HRGN CreatePolygonRgn(
    const POINT* pptl,
    INT cPoint,
    CREATE_POLYGON_RGN_MODE iMode
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function CreatePolygonRgn(
    pptl As IntPtr,   ' POINT*
    cPoint As Integer,   ' INT
    iMode As Integer   ' CREATE_POLYGON_RGN_MODE
) As IntPtr
End Function

' pptl : POINT*
' cPoint : INT
' iMode : CREATE_POLYGON_RGN_MODE
Declare PtrSafe Function CreatePolygonRgn Lib "gdi32" ( _
    ByVal pptl As LongPtr, _
    ByVal cPoint As Long, _
    ByVal iMode As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CreatePolygonRgn = ctypes.windll.gdi32.CreatePolygonRgn
CreatePolygonRgn.restype = ctypes.c_void_p
CreatePolygonRgn.argtypes = [
    ctypes.c_void_p,  # pptl : POINT*
    ctypes.c_int,  # cPoint : INT
    ctypes.c_int,  # iMode : CREATE_POLYGON_RGN_MODE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
CreatePolygonRgn = Fiddle::Function.new(
  lib['CreatePolygonRgn'],
  [
    Fiddle::TYPE_VOIDP,  # pptl : POINT*
    Fiddle::TYPE_INT,  # cPoint : INT
    Fiddle::TYPE_INT,  # iMode : CREATE_POLYGON_RGN_MODE
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "gdi32")]
extern "system" {
    fn CreatePolygonRgn(
        pptl: *const POINT,  // POINT*
        cPoint: i32,  // INT
        iMode: i32  // CREATE_POLYGON_RGN_MODE
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern IntPtr CreatePolygonRgn(IntPtr pptl, int cPoint, int iMode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_CreatePolygonRgn' -Namespace Win32 -PassThru
# $api::CreatePolygonRgn(pptl, cPoint, iMode)

#uselib "GDI32.dll"
#func global CreatePolygonRgn "CreatePolygonRgn" sptr, sptr, sptr
; CreatePolygonRgn varptr(pptl), cPoint, iMode   ; 戻り値は stat
; pptl : POINT* -> "sptr"
; cPoint : INT -> "sptr"
; iMode : CREATE_POLYGON_RGN_MODE -> "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。

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procCreatePolygonRgn = gdi32.NewProc("CreatePolygonRgn")
)

// pptl (POINT*), cPoint (INT), iMode (CREATE_POLYGON_RGN_MODE)
r1, _, err := procCreatePolygonRgn.Call(
	uintptr(pptl),
	uintptr(cPoint),
	uintptr(iMode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRGN

function CreatePolygonRgn(
  pptl: Pointer;   // POINT*
  cPoint: Integer;   // INT
  iMode: Integer   // CREATE_POLYGON_RGN_MODE
): THandle; stdcall;
  external 'GDI32.dll' name 'CreatePolygonRgn';

result := DllCall("GDI32\CreatePolygonRgn"
    , "Ptr", pptl   ; POINT*
    , "Int", cPoint   ; INT
    , "Int", iMode   ; CREATE_POLYGON_RGN_MODE
    , "Ptr")   ; return: HRGN

●CreatePolygonRgn(pptl, cPoint, iMode) = DLL("GDI32.dll", "void* CreatePolygonRgn(void*, int, int)")
# 呼び出し: CreatePolygonRgn(pptl, cPoint, iMode)
# pptl : POINT* -> "void*"
# cPoint : INT -> "int"
# iMode : CREATE_POLYGON_RGN_MODE -> "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 "gdi32" fn CreatePolygonRgn(
    pptl: [*c]POINT, // POINT*
    cPoint: i32, // INT
    iMode: i32 // CREATE_POLYGON_RGN_MODE
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc CreatePolygonRgn(
    pptl: ptr POINT,  # POINT*
    cPoint: int32,  # INT
    iMode: int32  # CREATE_POLYGON_RGN_MODE
): pointer {.importc: "CreatePolygonRgn", stdcall, dynlib: "GDI32.dll".}

pragma(lib, "gdi32");
extern(Windows)
void* CreatePolygonRgn(
    POINT* pptl,   // POINT*
    int cPoint,   // INT
    int iMode   // CREATE_POLYGON_RGN_MODE
);

ccall((:CreatePolygonRgn, "GDI32.dll"), stdcall, Ptr{Cvoid},
      (Ptr{POINT}, Int32, Int32),
      pptl, cPoint, iMode)
# pptl : POINT* -> Ptr{POINT}
# cPoint : INT -> Int32
# iMode : CREATE_POLYGON_RGN_MODE -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* CreatePolygonRgn(
    void* pptl,
    int32_t cPoint,
    int32_t iMode);
]]
local gdi32 = ffi.load("gdi32")
-- gdi32.CreatePolygonRgn(pptl, cPoint, iMode)
-- pptl : POINT*
-- cPoint : INT
-- iMode : CREATE_POLYGON_RGN_MODE
-- 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('GDI32.dll');
const CreatePolygonRgn = lib.func('__stdcall', 'CreatePolygonRgn', 'void *', ['void *', 'int32_t', 'int32_t']);
// CreatePolygonRgn(pptl, cPoint, iMode)
// pptl : POINT* -> 'void *'
// cPoint : INT -> 'int32_t'
// iMode : CREATE_POLYGON_RGN_MODE -> '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("GDI32.dll", {
  CreatePolygonRgn: { parameters: ["pointer", "i32", "i32"], result: "pointer" },
});
// lib.symbols.CreatePolygonRgn(pptl, cPoint, iMode)
// pptl : POINT* -> "pointer"
// cPoint : INT -> "i32"
// iMode : CREATE_POLYGON_RGN_MODE -> "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
void* CreatePolygonRgn(
    void* pptl,
    int32_t cPoint,
    int32_t iMode);
C, "GDI32.dll");
// $ffi->CreatePolygonRgn(pptl, cPoint, iMode);
// pptl : POINT*
// cPoint : INT
// iMode : CREATE_POLYGON_RGN_MODE
// 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 Gdi32 extends StdCallLibrary {
    Gdi32 INSTANCE = Native.load("gdi32", Gdi32.class);
    Pointer CreatePolygonRgn(
        Pointer pptl,   // POINT*
        int cPoint,   // INT
        int iMode   // CREATE_POLYGON_RGN_MODE
    );
}

@[Link("gdi32")]
lib LibGDI32
  fun CreatePolygonRgn = CreatePolygonRgn(
    pptl : POINT*,   # POINT*
    cPoint : Int32,   # INT
    iMode : Int32   # CREATE_POLYGON_RGN_MODE
  ) : 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 CreatePolygonRgnNative = Pointer<Void> Function(Pointer<Void>, Int32, Int32);
typedef CreatePolygonRgnDart = Pointer<Void> Function(Pointer<Void>, int, int);
final CreatePolygonRgn = DynamicLibrary.open('GDI32.dll')
    .lookupFunction<CreatePolygonRgnNative, CreatePolygonRgnDart>('CreatePolygonRgn');
// pptl : POINT* -> Pointer<Void>
// cPoint : INT -> Int32
// iMode : CREATE_POLYGON_RGN_MODE -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CreatePolygonRgn(
  pptl: Pointer;   // POINT*
  cPoint: Integer;   // INT
  iMode: Integer   // CREATE_POLYGON_RGN_MODE
): THandle; stdcall;
  external 'GDI32.dll' name 'CreatePolygonRgn';

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

foreign import stdcall safe "CreatePolygonRgn"
  c_CreatePolygonRgn :: Ptr () -> Int32 -> Int32 -> IO (Ptr ())
-- pptl : POINT* -> Ptr ()
-- cPoint : INT -> Int32
-- iMode : CREATE_POLYGON_RGN_MODE -> 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 createpolygonrgn =
  foreign "CreatePolygonRgn"
    ((ptr void) @-> int32_t @-> int32_t @-> returning (ptr void))
(* pptl : POINT* -> (ptr void) *)
(* cPoint : INT -> int32_t *)
(* iMode : CREATE_POLYGON_RGN_MODE -> 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 gdi32 (t "GDI32.dll"))
(cffi:use-foreign-library gdi32)

(cffi:defcfun ("CreatePolygonRgn" create-polygon-rgn :convention :stdcall) :pointer
  (pptl :pointer)   ; POINT*
  (c-point :int32)   ; INT
  (i-mode :int32))   ; CREATE_POLYGON_RGN_MODE
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CreatePolygonRgn = Win32::API::More->new('GDI32',
    'HANDLE CreatePolygonRgn(LPVOID pptl, int cPoint, int iMode)');
# my $ret = $CreatePolygonRgn->Call($pptl, $cPoint, $iMode);
# pptl : POINT* -> LPVOID
# cPoint : INT -> int
# iMode : CREATE_POLYGON_RGN_MODE -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。