PolyPolyline

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

BOOL PolyPolyline(
    HDC hdc,
    const POINT* apt,
    const DWORD* asz,
    DWORD csz
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function PolyPolyline(
    hdc As IntPtr,   ' HDC
    apt As IntPtr,   ' POINT*
    ByRef asz As UInteger,   ' DWORD*
    csz As UInteger   ' DWORD
) As Boolean
End Function

' hdc : HDC
' apt : POINT*
' asz : DWORD*
' csz : DWORD
Declare PtrSafe Function PolyPolyline Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal apt As LongPtr, _
    ByRef asz As Long, _
    ByVal csz 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

PolyPolyline = ctypes.windll.gdi32.PolyPolyline
PolyPolyline.restype = wintypes.BOOL
PolyPolyline.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_void_p,  # apt : POINT*
    ctypes.POINTER(wintypes.DWORD),  # asz : DWORD*
    wintypes.DWORD,  # csz : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
PolyPolyline = Fiddle::Function.new(
  lib['PolyPolyline'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # apt : POINT*
    Fiddle::TYPE_VOIDP,  # asz : DWORD*
    -Fiddle::TYPE_INT,  # csz : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn PolyPolyline(
        hdc: *mut core::ffi::c_void,  // HDC
        apt: *const POINT,  // POINT*
        asz: *const u32,  // DWORD*
        csz: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool PolyPolyline(IntPtr hdc, IntPtr apt, ref uint asz, uint csz);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_PolyPolyline' -Namespace Win32 -PassThru
# $api::PolyPolyline(hdc, apt, asz, csz)

#uselib "GDI32.dll"
#func global PolyPolyline "PolyPolyline" sptr, sptr, sptr, sptr
; PolyPolyline hdc, varptr(apt), varptr(asz), csz   ; 戻り値は stat
; hdc : HDC -> "sptr"
; apt : POINT* -> "sptr"
; asz : DWORD* -> "sptr"
; csz : DWORD -> "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 PolyPolyline "PolyPolyline" sptr, var, var, int
; res = PolyPolyline(hdc, apt, asz, csz)
; hdc : HDC -> "sptr"
; apt : POINT* -> "var"
; asz : DWORD* -> "var"
; csz : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL PolyPolyline(HDC hdc, POINT* apt, DWORD* asz, DWORD csz)
#uselib "GDI32.dll"
#cfunc global PolyPolyline "PolyPolyline" intptr, var, var, int
; res = PolyPolyline(hdc, apt, asz, csz)
; hdc : HDC -> "intptr"
; apt : POINT* -> "var"
; asz : DWORD* -> "var"
; csz : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procPolyPolyline = gdi32.NewProc("PolyPolyline")
)

// hdc (HDC), apt (POINT*), asz (DWORD*), csz (DWORD)
r1, _, err := procPolyPolyline.Call(
	uintptr(hdc),
	uintptr(apt),
	uintptr(asz),
	uintptr(csz),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function PolyPolyline(
  hdc: THandle;   // HDC
  apt: Pointer;   // POINT*
  asz: Pointer;   // DWORD*
  csz: DWORD   // DWORD
): BOOL; stdcall;
  external 'GDI32.dll' name 'PolyPolyline';

result := DllCall("GDI32\PolyPolyline"
    , "Ptr", hdc   ; HDC
    , "Ptr", apt   ; POINT*
    , "Ptr", asz   ; DWORD*
    , "UInt", csz   ; DWORD
    , "Int")   ; return: BOOL

●PolyPolyline(hdc, apt, asz, csz) = DLL("GDI32.dll", "bool PolyPolyline(void*, void*, void*, dword)")
# 呼び出し: PolyPolyline(hdc, apt, asz, csz)
# hdc : HDC -> "void*"
# apt : POINT* -> "void*"
# asz : DWORD* -> "void*"
# csz : DWORD -> "dword"
# 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)。