CreateRoundRectRgn

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

HRGN CreateRoundRectRgn(
    INT x1,
    INT y1,
    INT x2,
    INT y2,
    INT w,
    INT h
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function CreateRoundRectRgn(
    x1 As Integer,   ' INT
    y1 As Integer,   ' INT
    x2 As Integer,   ' INT
    y2 As Integer,   ' INT
    w As Integer,   ' INT
    h As Integer   ' INT
) As IntPtr
End Function

' x1 : INT
' y1 : INT
' x2 : INT
' y2 : INT
' w : INT
' h : INT
Declare PtrSafe Function CreateRoundRectRgn Lib "gdi32" ( _
    ByVal x1 As Long, _
    ByVal y1 As Long, _
    ByVal x2 As Long, _
    ByVal y2 As Long, _
    ByVal w As Long, _
    ByVal h 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

CreateRoundRectRgn = ctypes.windll.gdi32.CreateRoundRectRgn
CreateRoundRectRgn.restype = ctypes.c_void_p
CreateRoundRectRgn.argtypes = [
    ctypes.c_int,  # x1 : INT
    ctypes.c_int,  # y1 : INT
    ctypes.c_int,  # x2 : INT
    ctypes.c_int,  # y2 : INT
    ctypes.c_int,  # w : INT
    ctypes.c_int,  # h : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
CreateRoundRectRgn = Fiddle::Function.new(
  lib['CreateRoundRectRgn'],
  [
    Fiddle::TYPE_INT,  # x1 : INT
    Fiddle::TYPE_INT,  # y1 : INT
    Fiddle::TYPE_INT,  # x2 : INT
    Fiddle::TYPE_INT,  # y2 : INT
    Fiddle::TYPE_INT,  # w : INT
    Fiddle::TYPE_INT,  # h : INT
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "gdi32")]
extern "system" {
    fn CreateRoundRectRgn(
        x1: i32,  // INT
        y1: i32,  // INT
        x2: i32,  // INT
        y2: i32,  // INT
        w: i32,  // INT
        h: i32  // INT
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern IntPtr CreateRoundRectRgn(int x1, int y1, int x2, int y2, int w, int h);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_CreateRoundRectRgn' -Namespace Win32 -PassThru
# $api::CreateRoundRectRgn(x1, y1, x2, y2, w, h)

#uselib "GDI32.dll"
#func global CreateRoundRectRgn "CreateRoundRectRgn" sptr, sptr, sptr, sptr, sptr, sptr
; CreateRoundRectRgn x1, y1, x2, y2, w, h   ; 戻り値は stat
; x1 : INT -> "sptr"
; y1 : INT -> "sptr"
; x2 : INT -> "sptr"
; y2 : INT -> "sptr"
; w : INT -> "sptr"
; h : 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 "GDI32.dll"
#cfunc global CreateRoundRectRgn "CreateRoundRectRgn" int, int, int, int, int, int
; res = CreateRoundRectRgn(x1, y1, x2, y2, w, h)
; x1 : INT -> "int"
; y1 : INT -> "int"
; x2 : INT -> "int"
; y2 : INT -> "int"
; w : INT -> "int"
; h : INT -> "int"

; HRGN CreateRoundRectRgn(INT x1, INT y1, INT x2, INT y2, INT w, INT h)
#uselib "GDI32.dll"
#cfunc global CreateRoundRectRgn "CreateRoundRectRgn" int, int, int, int, int, int
; res = CreateRoundRectRgn(x1, y1, x2, y2, w, h)
; x1 : INT -> "int"
; y1 : INT -> "int"
; x2 : INT -> "int"
; y2 : INT -> "int"
; w : INT -> "int"
; h : INT -> "int"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procCreateRoundRectRgn = gdi32.NewProc("CreateRoundRectRgn")
)

// x1 (INT), y1 (INT), x2 (INT), y2 (INT), w (INT), h (INT)
r1, _, err := procCreateRoundRectRgn.Call(
	uintptr(x1),
	uintptr(y1),
	uintptr(x2),
	uintptr(y2),
	uintptr(w),
	uintptr(h),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRGN

function CreateRoundRectRgn(
  x1: Integer;   // INT
  y1: Integer;   // INT
  x2: Integer;   // INT
  y2: Integer;   // INT
  w: Integer;   // INT
  h: Integer   // INT
): THandle; stdcall;
  external 'GDI32.dll' name 'CreateRoundRectRgn';

result := DllCall("GDI32\CreateRoundRectRgn"
    , "Int", x1   ; INT
    , "Int", y1   ; INT
    , "Int", x2   ; INT
    , "Int", y2   ; INT
    , "Int", w   ; INT
    , "Int", h   ; INT
    , "Ptr")   ; return: HRGN

●CreateRoundRectRgn(x1, y1, x2, y2, w, h) = DLL("GDI32.dll", "void* CreateRoundRectRgn(int, int, int, int, int, int)")
# 呼び出し: CreateRoundRectRgn(x1, y1, x2, y2, w, h)
# x1 : INT -> "int"
# y1 : INT -> "int"
# x2 : INT -> "int"
# y2 : INT -> "int"
# w : INT -> "int"
# h : 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 "gdi32" fn CreateRoundRectRgn(
    x1: i32, // INT
    y1: i32, // INT
    x2: i32, // INT
    y2: i32, // INT
    w: i32, // INT
    h: i32 // INT
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc CreateRoundRectRgn(
    x1: int32,  # INT
    y1: int32,  # INT
    x2: int32,  # INT
    y2: int32,  # INT
    w: int32,  # INT
    h: int32  # INT
): pointer {.importc: "CreateRoundRectRgn", stdcall, dynlib: "GDI32.dll".}

pragma(lib, "gdi32");
extern(Windows)
void* CreateRoundRectRgn(
    int x1,   // INT
    int y1,   // INT
    int x2,   // INT
    int y2,   // INT
    int w,   // INT
    int h   // INT
);

ccall((:CreateRoundRectRgn, "GDI32.dll"), stdcall, Ptr{Cvoid},
      (Int32, Int32, Int32, Int32, Int32, Int32),
      x1, y1, x2, y2, w, h)
# x1 : INT -> Int32
# y1 : INT -> Int32
# x2 : INT -> Int32
# y2 : INT -> Int32
# w : INT -> Int32
# h : INT -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* CreateRoundRectRgn(
    int32_t x1,
    int32_t y1,
    int32_t x2,
    int32_t y2,
    int32_t w,
    int32_t h);
]]
local gdi32 = ffi.load("gdi32")
-- gdi32.CreateRoundRectRgn(x1, y1, x2, y2, w, h)
-- x1 : INT
-- y1 : INT
-- x2 : INT
-- y2 : INT
-- w : INT
-- h : 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('GDI32.dll');
const CreateRoundRectRgn = lib.func('__stdcall', 'CreateRoundRectRgn', 'void *', ['int32_t', 'int32_t', 'int32_t', 'int32_t', 'int32_t', 'int32_t']);
// CreateRoundRectRgn(x1, y1, x2, y2, w, h)
// x1 : INT -> 'int32_t'
// y1 : INT -> 'int32_t'
// x2 : INT -> 'int32_t'
// y2 : INT -> 'int32_t'
// w : INT -> 'int32_t'
// h : 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("GDI32.dll", {
  CreateRoundRectRgn: { parameters: ["i32", "i32", "i32", "i32", "i32", "i32"], result: "pointer" },
});
// lib.symbols.CreateRoundRectRgn(x1, y1, x2, y2, w, h)
// x1 : INT -> "i32"
// y1 : INT -> "i32"
// x2 : INT -> "i32"
// y2 : INT -> "i32"
// w : INT -> "i32"
// h : 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
void* CreateRoundRectRgn(
    int32_t x1,
    int32_t y1,
    int32_t x2,
    int32_t y2,
    int32_t w,
    int32_t h);
C, "GDI32.dll");
// $ffi->CreateRoundRectRgn(x1, y1, x2, y2, w, h);
// x1 : INT
// y1 : INT
// x2 : INT
// y2 : INT
// w : INT
// h : 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 Gdi32 extends StdCallLibrary {
    Gdi32 INSTANCE = Native.load("gdi32", Gdi32.class);
    Pointer CreateRoundRectRgn(
        int x1,   // INT
        int y1,   // INT
        int x2,   // INT
        int y2,   // INT
        int w,   // INT
        int h   // INT
    );
}

@[Link("gdi32")]
lib LibGDI32
  fun CreateRoundRectRgn = CreateRoundRectRgn(
    x1 : Int32,   # INT
    y1 : Int32,   # INT
    x2 : Int32,   # INT
    y2 : Int32,   # INT
    w : Int32,   # INT
    h : Int32   # INT
  ) : 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 CreateRoundRectRgnNative = Pointer<Void> Function(Int32, Int32, Int32, Int32, Int32, Int32);
typedef CreateRoundRectRgnDart = Pointer<Void> Function(int, int, int, int, int, int);
final CreateRoundRectRgn = DynamicLibrary.open('GDI32.dll')
    .lookupFunction<CreateRoundRectRgnNative, CreateRoundRectRgnDart>('CreateRoundRectRgn');
// x1 : INT -> Int32
// y1 : INT -> Int32
// x2 : INT -> Int32
// y2 : INT -> Int32
// w : INT -> Int32
// h : INT -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CreateRoundRectRgn(
  x1: Integer;   // INT
  y1: Integer;   // INT
  x2: Integer;   // INT
  y2: Integer;   // INT
  w: Integer;   // INT
  h: Integer   // INT
): THandle; stdcall;
  external 'GDI32.dll' name 'CreateRoundRectRgn';

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

foreign import stdcall safe "CreateRoundRectRgn"
  c_CreateRoundRectRgn :: Int32 -> Int32 -> Int32 -> Int32 -> Int32 -> Int32 -> IO (Ptr ())
-- x1 : INT -> Int32
-- y1 : INT -> Int32
-- x2 : INT -> Int32
-- y2 : INT -> Int32
-- w : INT -> Int32
-- h : 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 createroundrectrgn =
  foreign "CreateRoundRectRgn"
    (int32_t @-> int32_t @-> int32_t @-> int32_t @-> int32_t @-> int32_t @-> returning (ptr void))
(* x1 : INT -> int32_t *)
(* y1 : INT -> int32_t *)
(* x2 : INT -> int32_t *)
(* y2 : INT -> int32_t *)
(* w : INT -> int32_t *)
(* h : 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 gdi32 (t "GDI32.dll"))
(cffi:use-foreign-library gdi32)

(cffi:defcfun ("CreateRoundRectRgn" create-round-rect-rgn :convention :stdcall) :pointer
  (x1 :int32)   ; INT
  (y1 :int32)   ; INT
  (x2 :int32)   ; INT
  (y2 :int32)   ; INT
  (w :int32)   ; INT
  (h :int32))   ; INT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CreateRoundRectRgn = Win32::API::More->new('GDI32',
    'HANDLE CreateRoundRectRgn(int x1, int y1, int x2, int y2, int w, int h)');
# my $ret = $CreateRoundRectRgn->Call($x1, $y1, $x2, $y2, $w, $h);
# x1 : INT -> int
# y1 : INT -> int
# x2 : INT -> int
# y2 : INT -> int
# w : INT -> int
# h : INT -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。