GdipSetPenStartCap

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

Status GdipSetPenStartCap(
    GpPen* pen,
    LineCap startCap
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipSetPenStartCap(
    pen As IntPtr,   ' GpPen* in/out
    startCap As Integer   ' LineCap
) As Integer
End Function

' pen : GpPen* in/out
' startCap : LineCap
Declare PtrSafe Function GdipSetPenStartCap Lib "gdiplus" ( _
    ByVal pen As LongPtr, _
    ByVal startCap 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

GdipSetPenStartCap = ctypes.windll.gdiplus.GdipSetPenStartCap
GdipSetPenStartCap.restype = ctypes.c_int
GdipSetPenStartCap.argtypes = [
    ctypes.c_void_p,  # pen : GpPen* in/out
    ctypes.c_int,  # startCap : LineCap
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipSetPenStartCap = Fiddle::Function.new(
  lib['GdipSetPenStartCap'],
  [
    Fiddle::TYPE_VOIDP,  # pen : GpPen* in/out
    Fiddle::TYPE_INT,  # startCap : LineCap
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipSetPenStartCap(
        pen: *mut GpPen,  // GpPen* in/out
        startCap: i32  // LineCap
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipSetPenStartCap(IntPtr pen, int startCap);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipSetPenStartCap' -Namespace Win32 -PassThru
# $api::GdipSetPenStartCap(pen, startCap)

#uselib "gdiplus.dll"
#func global GdipSetPenStartCap "GdipSetPenStartCap" sptr, sptr
; GdipSetPenStartCap varptr(pen), startCap   ; 戻り値は stat
; pen : GpPen* in/out -> "sptr"
; startCap : LineCap -> "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 (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipSetPenStartCap = gdiplus.NewProc("GdipSetPenStartCap")
)

// pen (GpPen* in/out), startCap (LineCap)
r1, _, err := procGdipSetPenStartCap.Call(
	uintptr(pen),
	uintptr(startCap),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipSetPenStartCap(
  pen: Pointer;   // GpPen* in/out
  startCap: Integer   // LineCap
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipSetPenStartCap';

result := DllCall("gdiplus\GdipSetPenStartCap"
    , "Ptr", pen   ; GpPen* in/out
    , "Int", startCap   ; LineCap
    , "Int")   ; return: Status

●GdipSetPenStartCap(pen, startCap) = DLL("gdiplus.dll", "int GdipSetPenStartCap(void*, int)")
# 呼び出し: GdipSetPenStartCap(pen, startCap)
# pen : GpPen* in/out -> "void*"
# startCap : LineCap -> "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 "gdiplus" fn GdipSetPenStartCap(
    pen: [*c]GpPen, // GpPen* in/out
    startCap: i32 // LineCap
) callconv(std.os.windows.WINAPI) i32;

proc GdipSetPenStartCap(
    pen: ptr GpPen,  # GpPen* in/out
    startCap: int32  # LineCap
): int32 {.importc: "GdipSetPenStartCap", stdcall, dynlib: "gdiplus.dll".}

pragma(lib, "gdiplus");
extern(Windows)
int GdipSetPenStartCap(
    GpPen* pen,   // GpPen* in/out
    int startCap   // LineCap
);

ccall((:GdipSetPenStartCap, "gdiplus.dll"), stdcall, Int32,
      (Ptr{GpPen}, Int32),
      pen, startCap)
# pen : GpPen* in/out -> Ptr{GpPen}
# startCap : LineCap -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GdipSetPenStartCap(
    void* pen,
    int32_t startCap);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipSetPenStartCap(pen, startCap)
-- pen : GpPen* in/out
-- startCap : LineCap
-- 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('gdiplus.dll');
const GdipSetPenStartCap = lib.func('__stdcall', 'GdipSetPenStartCap', 'int32_t', ['void *', 'int32_t']);
// GdipSetPenStartCap(pen, startCap)
// pen : GpPen* in/out -> 'void *'
// startCap : LineCap -> '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("gdiplus.dll", {
  GdipSetPenStartCap: { parameters: ["pointer", "i32"], result: "i32" },
});
// lib.symbols.GdipSetPenStartCap(pen, startCap)
// pen : GpPen* in/out -> "pointer"
// startCap : LineCap -> "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
int32_t GdipSetPenStartCap(
    void* pen,
    int32_t startCap);
C, "gdiplus.dll");
// $ffi->GdipSetPenStartCap(pen, startCap);
// pen : GpPen* in/out
// startCap : LineCap
// 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 Gdiplus extends StdCallLibrary {
    Gdiplus INSTANCE = Native.load("gdiplus", Gdiplus.class);
    int GdipSetPenStartCap(
        Pointer pen,   // GpPen* in/out
        int startCap   // LineCap
    );
}

@[Link("gdiplus")]
lib Libgdiplus
  fun GdipSetPenStartCap = GdipSetPenStartCap(
    pen : GpPen*,   # GpPen* in/out
    startCap : Int32   # LineCap
  ) : Int32
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 GdipSetPenStartCapNative = Int32 Function(Pointer<Void>, Int32);
typedef GdipSetPenStartCapDart = int Function(Pointer<Void>, int);
final GdipSetPenStartCap = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipSetPenStartCapNative, GdipSetPenStartCapDart>('GdipSetPenStartCap');
// pen : GpPen* in/out -> Pointer<Void>
// startCap : LineCap -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GdipSetPenStartCap(
  pen: Pointer;   // GpPen* in/out
  startCap: Integer   // LineCap
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipSetPenStartCap';

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

foreign import stdcall safe "GdipSetPenStartCap"
  c_GdipSetPenStartCap :: Ptr () -> Int32 -> IO Int32
-- pen : GpPen* in/out -> Ptr ()
-- startCap : LineCap -> 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 gdipsetpenstartcap =
  foreign "GdipSetPenStartCap"
    ((ptr void) @-> int32_t @-> returning int32_t)
(* pen : GpPen* in/out -> (ptr void) *)
(* startCap : LineCap -> 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 gdiplus (t "gdiplus.dll"))
(cffi:use-foreign-library gdiplus)

(cffi:defcfun ("GdipSetPenStartCap" gdip-set-pen-start-cap :convention :stdcall) :int32
  (pen :pointer)   ; GpPen* in/out
  (start-cap :int32))   ; LineCap
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GdipSetPenStartCap = Win32::API::More->new('gdiplus',
    'int GdipSetPenStartCap(LPVOID pen, int startCap)');
# my $ret = $GdipSetPenStartCap->Call($pen, $startCap);
# pen : GpPen* in/out -> LPVOID
# startCap : LineCap -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。