Chord

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

BOOL Chord(
    HDC hdc,
    INT x1,
    INT y1,
    INT x2,
    INT y2,
    INT x3,
    INT y3,
    INT x4,
    INT y4
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function Chord(
    hdc As IntPtr,   ' HDC
    x1 As Integer,   ' INT
    y1 As Integer,   ' INT
    x2 As Integer,   ' INT
    y2 As Integer,   ' INT
    x3 As Integer,   ' INT
    y3 As Integer,   ' INT
    x4 As Integer,   ' INT
    y4 As Integer   ' INT
) As Boolean
End Function

' hdc : HDC
' x1 : INT
' y1 : INT
' x2 : INT
' y2 : INT
' x3 : INT
' y3 : INT
' x4 : INT
' y4 : INT
Declare PtrSafe Function Chord Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal x1 As Long, _
    ByVal y1 As Long, _
    ByVal x2 As Long, _
    ByVal y2 As Long, _
    ByVal x3 As Long, _
    ByVal y3 As Long, _
    ByVal x4 As Long, _
    ByVal y4 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

Chord = ctypes.windll.gdi32.Chord
Chord.restype = wintypes.BOOL
Chord.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_int,  # x1 : INT
    ctypes.c_int,  # y1 : INT
    ctypes.c_int,  # x2 : INT
    ctypes.c_int,  # y2 : INT
    ctypes.c_int,  # x3 : INT
    ctypes.c_int,  # y3 : INT
    ctypes.c_int,  # x4 : INT
    ctypes.c_int,  # y4 : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
Chord = Fiddle::Function.new(
  lib['Chord'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_INT,  # x1 : INT
    Fiddle::TYPE_INT,  # y1 : INT
    Fiddle::TYPE_INT,  # x2 : INT
    Fiddle::TYPE_INT,  # y2 : INT
    Fiddle::TYPE_INT,  # x3 : INT
    Fiddle::TYPE_INT,  # y3 : INT
    Fiddle::TYPE_INT,  # x4 : INT
    Fiddle::TYPE_INT,  # y4 : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn Chord(
        hdc: *mut core::ffi::c_void,  // HDC
        x1: i32,  // INT
        y1: i32,  // INT
        x2: i32,  // INT
        y2: i32,  // INT
        x3: i32,  // INT
        y3: i32,  // INT
        x4: i32,  // INT
        y4: 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 Chord(IntPtr hdc, int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_Chord' -Namespace Win32 -PassThru
# $api::Chord(hdc, x1, y1, x2, y2, x3, y3, x4, y4)

#uselib "GDI32.dll"
#func global Chord "Chord" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; Chord hdc, x1, y1, x2, y2, x3, y3, x4, y4   ; 戻り値は stat
; hdc : HDC -> "sptr"
; x1 : INT -> "sptr"
; y1 : INT -> "sptr"
; x2 : INT -> "sptr"
; y2 : INT -> "sptr"
; x3 : INT -> "sptr"
; y3 : INT -> "sptr"
; x4 : INT -> "sptr"
; y4 : 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 Chord "Chord" sptr, int, int, int, int, int, int, int, int
; res = Chord(hdc, x1, y1, x2, y2, x3, y3, x4, y4)
; hdc : HDC -> "sptr"
; x1 : INT -> "int"
; y1 : INT -> "int"
; x2 : INT -> "int"
; y2 : INT -> "int"
; x3 : INT -> "int"
; y3 : INT -> "int"
; x4 : INT -> "int"
; y4 : INT -> "int"

; BOOL Chord(HDC hdc, INT x1, INT y1, INT x2, INT y2, INT x3, INT y3, INT x4, INT y4)
#uselib "GDI32.dll"
#cfunc global Chord "Chord" intptr, int, int, int, int, int, int, int, int
; res = Chord(hdc, x1, y1, x2, y2, x3, y3, x4, y4)
; hdc : HDC -> "intptr"
; x1 : INT -> "int"
; y1 : INT -> "int"
; x2 : INT -> "int"
; y2 : INT -> "int"
; x3 : INT -> "int"
; y3 : INT -> "int"
; x4 : INT -> "int"
; y4 : INT -> "int"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procChord = gdi32.NewProc("Chord")
)

// hdc (HDC), x1 (INT), y1 (INT), x2 (INT), y2 (INT), x3 (INT), y3 (INT), x4 (INT), y4 (INT)
r1, _, err := procChord.Call(
	uintptr(hdc),
	uintptr(x1),
	uintptr(y1),
	uintptr(x2),
	uintptr(y2),
	uintptr(x3),
	uintptr(y3),
	uintptr(x4),
	uintptr(y4),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function Chord(
  hdc: THandle;   // HDC
  x1: Integer;   // INT
  y1: Integer;   // INT
  x2: Integer;   // INT
  y2: Integer;   // INT
  x3: Integer;   // INT
  y3: Integer;   // INT
  x4: Integer;   // INT
  y4: Integer   // INT
): BOOL; stdcall;
  external 'GDI32.dll' name 'Chord';

result := DllCall("GDI32\Chord"
    , "Ptr", hdc   ; HDC
    , "Int", x1   ; INT
    , "Int", y1   ; INT
    , "Int", x2   ; INT
    , "Int", y2   ; INT
    , "Int", x3   ; INT
    , "Int", y3   ; INT
    , "Int", x4   ; INT
    , "Int", y4   ; INT
    , "Int")   ; return: BOOL

●Chord(hdc, x1, y1, x2, y2, x3, y3, x4, y4) = DLL("GDI32.dll", "bool Chord(void*, int, int, int, int, int, int, int, int)")
# 呼び出し: Chord(hdc, x1, y1, x2, y2, x3, y3, x4, y4)
# hdc : HDC -> "void*"
# x1 : INT -> "int"
# y1 : INT -> "int"
# x2 : INT -> "int"
# y2 : INT -> "int"
# x3 : INT -> "int"
# y3 : INT -> "int"
# x4 : INT -> "int"
# y4 : 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)。