GdipSetPenLineJoin

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

Status GdipSetPenLineJoin(
    GpPen* pen,
    LineJoin lineJoin
);

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

' pen : GpPen* in/out
' lineJoin : LineJoin
Declare PtrSafe Function GdipSetPenLineJoin Lib "gdiplus" ( _
    ByVal pen As LongPtr, _
    ByVal lineJoin 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

GdipSetPenLineJoin = ctypes.windll.gdiplus.GdipSetPenLineJoin
GdipSetPenLineJoin.restype = ctypes.c_int
GdipSetPenLineJoin.argtypes = [
    ctypes.c_void_p,  # pen : GpPen* in/out
    ctypes.c_int,  # lineJoin : LineJoin
]

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "gdiplus.dll"
#func global GdipSetPenLineJoin "GdipSetPenLineJoin" sptr, sptr
; GdipSetPenLineJoin varptr(pen), lineJoin   ; 戻り値は stat
; pen : GpPen* in/out -> "sptr"
; lineJoin : LineJoin -> "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 "gdiplus.dll"
#cfunc global GdipSetPenLineJoin "GdipSetPenLineJoin" var, int
; res = GdipSetPenLineJoin(pen, lineJoin)
; pen : GpPen* in/out -> "var"
; lineJoin : LineJoin -> "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。

; Status GdipSetPenLineJoin(GpPen* pen, LineJoin lineJoin)
#uselib "gdiplus.dll"
#cfunc global GdipSetPenLineJoin "GdipSetPenLineJoin" var, int
; res = GdipSetPenLineJoin(pen, lineJoin)
; pen : GpPen* in/out -> "var"
; lineJoin : LineJoin -> "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 (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipSetPenLineJoin = gdiplus.NewProc("GdipSetPenLineJoin")
)

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

function GdipSetPenLineJoin(
  pen: Pointer;   // GpPen* in/out
  lineJoin: Integer   // LineJoin
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipSetPenLineJoin';

result := DllCall("gdiplus\GdipSetPenLineJoin"
    , "Ptr", pen   ; GpPen* in/out
    , "Int", lineJoin   ; LineJoin
    , "Int")   ; return: Status

●GdipSetPenLineJoin(pen, lineJoin) = DLL("gdiplus.dll", "int GdipSetPenLineJoin(void*, int)")
# 呼び出し: GdipSetPenLineJoin(pen, lineJoin)
# pen : GpPen* in/out -> "void*"
# lineJoin : LineJoin -> "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)。