ArcTo

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

BOOL ArcTo(
    HDC hdc,
    INT left,
    INT top,
    INT right,
    INT bottom,
    INT xr1,
    INT yr1,
    INT xr2,
    INT yr2
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function ArcTo(
    hdc As IntPtr,   ' HDC
    left As Integer,   ' INT
    top As Integer,   ' INT
    right As Integer,   ' INT
    bottom As Integer,   ' INT
    xr1 As Integer,   ' INT
    yr1 As Integer,   ' INT
    xr2 As Integer,   ' INT
    yr2 As Integer   ' INT
) As Boolean
End Function

' hdc : HDC
' left : INT
' top : INT
' right : INT
' bottom : INT
' xr1 : INT
' yr1 : INT
' xr2 : INT
' yr2 : INT
Declare PtrSafe Function ArcTo Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal left As Long, _
    ByVal top As Long, _
    ByVal right As Long, _
    ByVal bottom As Long, _
    ByVal xr1 As Long, _
    ByVal yr1 As Long, _
    ByVal xr2 As Long, _
    ByVal yr2 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

ArcTo = ctypes.windll.gdi32.ArcTo
ArcTo.restype = wintypes.BOOL
ArcTo.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_int,  # left : INT
    ctypes.c_int,  # top : INT
    ctypes.c_int,  # right : INT
    ctypes.c_int,  # bottom : INT
    ctypes.c_int,  # xr1 : INT
    ctypes.c_int,  # yr1 : INT
    ctypes.c_int,  # xr2 : INT
    ctypes.c_int,  # yr2 : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
ArcTo = Fiddle::Function.new(
  lib['ArcTo'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_INT,  # left : INT
    Fiddle::TYPE_INT,  # top : INT
    Fiddle::TYPE_INT,  # right : INT
    Fiddle::TYPE_INT,  # bottom : INT
    Fiddle::TYPE_INT,  # xr1 : INT
    Fiddle::TYPE_INT,  # yr1 : INT
    Fiddle::TYPE_INT,  # xr2 : INT
    Fiddle::TYPE_INT,  # yr2 : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn ArcTo(
        hdc: *mut core::ffi::c_void,  // HDC
        left: i32,  // INT
        top: i32,  // INT
        right: i32,  // INT
        bottom: i32,  // INT
        xr1: i32,  // INT
        yr1: i32,  // INT
        xr2: i32,  // INT
        yr2: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool ArcTo(IntPtr hdc, int left, int top, int right, int bottom, int xr1, int yr1, int xr2, int yr2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_ArcTo' -Namespace Win32 -PassThru
# $api::ArcTo(hdc, left, top, right, bottom, xr1, yr1, xr2, yr2)

#uselib "GDI32.dll"
#func global ArcTo "ArcTo" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; ArcTo hdc, left, top, right, bottom, xr1, yr1, xr2, yr2   ; 戻り値は stat
; hdc : HDC -> "sptr"
; left : INT -> "sptr"
; top : INT -> "sptr"
; right : INT -> "sptr"
; bottom : INT -> "sptr"
; xr1 : INT -> "sptr"
; yr1 : INT -> "sptr"
; xr2 : INT -> "sptr"
; yr2 : 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 ArcTo "ArcTo" sptr, int, int, int, int, int, int, int, int
; res = ArcTo(hdc, left, top, right, bottom, xr1, yr1, xr2, yr2)
; hdc : HDC -> "sptr"
; left : INT -> "int"
; top : INT -> "int"
; right : INT -> "int"
; bottom : INT -> "int"
; xr1 : INT -> "int"
; yr1 : INT -> "int"
; xr2 : INT -> "int"
; yr2 : INT -> "int"

; BOOL ArcTo(HDC hdc, INT left, INT top, INT right, INT bottom, INT xr1, INT yr1, INT xr2, INT yr2)
#uselib "GDI32.dll"
#cfunc global ArcTo "ArcTo" intptr, int, int, int, int, int, int, int, int
; res = ArcTo(hdc, left, top, right, bottom, xr1, yr1, xr2, yr2)
; hdc : HDC -> "intptr"
; left : INT -> "int"
; top : INT -> "int"
; right : INT -> "int"
; bottom : INT -> "int"
; xr1 : INT -> "int"
; yr1 : INT -> "int"
; xr2 : INT -> "int"
; yr2 : INT -> "int"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procArcTo = gdi32.NewProc("ArcTo")
)

// hdc (HDC), left (INT), top (INT), right (INT), bottom (INT), xr1 (INT), yr1 (INT), xr2 (INT), yr2 (INT)
r1, _, err := procArcTo.Call(
	uintptr(hdc),
	uintptr(left),
	uintptr(top),
	uintptr(right),
	uintptr(bottom),
	uintptr(xr1),
	uintptr(yr1),
	uintptr(xr2),
	uintptr(yr2),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ArcTo(
  hdc: THandle;   // HDC
  left: Integer;   // INT
  top: Integer;   // INT
  right: Integer;   // INT
  bottom: Integer;   // INT
  xr1: Integer;   // INT
  yr1: Integer;   // INT
  xr2: Integer;   // INT
  yr2: Integer   // INT
): BOOL; stdcall;
  external 'GDI32.dll' name 'ArcTo';

result := DllCall("GDI32\ArcTo"
    , "Ptr", hdc   ; HDC
    , "Int", left   ; INT
    , "Int", top   ; INT
    , "Int", right   ; INT
    , "Int", bottom   ; INT
    , "Int", xr1   ; INT
    , "Int", yr1   ; INT
    , "Int", xr2   ; INT
    , "Int", yr2   ; INT
    , "Int")   ; return: BOOL

●ArcTo(hdc, left, top, right, bottom, xr1, yr1, xr2, yr2) = DLL("GDI32.dll", "bool ArcTo(void*, int, int, int, int, int, int, int, int)")
# 呼び出し: ArcTo(hdc, left, top, right, bottom, xr1, yr1, xr2, yr2)
# hdc : HDC -> "void*"
# left : INT -> "int"
# top : INT -> "int"
# right : INT -> "int"
# bottom : INT -> "int"
# xr1 : INT -> "int"
# yr1 : INT -> "int"
# xr2 : INT -> "int"
# yr2 : 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)。