GdipWidenPath

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

Status GdipWidenPath(
    GpPath* nativePath,
    GpPen* pen,
    Matrix* matrix,
    FLOAT flatness
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipWidenPath(
    nativePath As IntPtr,   ' GpPath* in/out
    pen As IntPtr,   ' GpPen* in/out
    ByRef matrix As IntPtr,   ' Matrix* in/out
    flatness As Single   ' FLOAT
) As Integer
End Function

' nativePath : GpPath* in/out
' pen : GpPen* in/out
' matrix : Matrix* in/out
' flatness : FLOAT
Declare PtrSafe Function GdipWidenPath Lib "gdiplus" ( _
    ByVal nativePath As LongPtr, _
    ByVal pen As LongPtr, _
    ByRef matrix As LongPtr, _
    ByVal flatness As Single) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GdipWidenPath = ctypes.windll.gdiplus.GdipWidenPath
GdipWidenPath.restype = ctypes.c_int
GdipWidenPath.argtypes = [
    ctypes.c_void_p,  # nativePath : GpPath* in/out
    ctypes.c_void_p,  # pen : GpPen* in/out
    ctypes.c_void_p,  # matrix : Matrix* in/out
    ctypes.c_float,  # flatness : FLOAT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipWidenPath = Fiddle::Function.new(
  lib['GdipWidenPath'],
  [
    Fiddle::TYPE_VOIDP,  # nativePath : GpPath* in/out
    Fiddle::TYPE_VOIDP,  # pen : GpPen* in/out
    Fiddle::TYPE_VOIDP,  # matrix : Matrix* in/out
    Fiddle::TYPE_FLOAT,  # flatness : FLOAT
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipWidenPath(
        nativePath: *mut GpPath,  // GpPath* in/out
        pen: *mut GpPen,  // GpPen* in/out
        matrix: *mut isize,  // Matrix* in/out
        flatness: f32  // FLOAT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipWidenPath(IntPtr nativePath, IntPtr pen, ref IntPtr matrix, float flatness);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipWidenPath' -Namespace Win32 -PassThru
# $api::GdipWidenPath(nativePath, pen, matrix, flatness)

#uselib "gdiplus.dll"
#func global GdipWidenPath "GdipWidenPath" sptr, sptr, sptr, float
; GdipWidenPath varptr(nativePath), varptr(pen), matrix, flatness   ; 戻り値は stat
; nativePath : GpPath* in/out -> "sptr"
; pen : GpPen* in/out -> "sptr"
; matrix : Matrix* in/out -> "sptr"
; flatness : FLOAT -> "float"
; ※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 GdipWidenPath "GdipWidenPath" var, var, int, float
; res = GdipWidenPath(nativePath, pen, matrix, flatness)
; nativePath : GpPath* in/out -> "var"
; pen : GpPen* in/out -> "var"
; matrix : Matrix* in/out -> "int"
; flatness : FLOAT -> "float"
; ※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 GdipWidenPath(GpPath* nativePath, GpPen* pen, Matrix* matrix, FLOAT flatness)
#uselib "gdiplus.dll"
#cfunc global GdipWidenPath "GdipWidenPath" var, var, int, float
; res = GdipWidenPath(nativePath, pen, matrix, flatness)
; nativePath : GpPath* in/out -> "var"
; pen : GpPen* in/out -> "var"
; matrix : Matrix* in/out -> "int"
; flatness : FLOAT -> "float"
; ※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 (
	"math"
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipWidenPath = gdiplus.NewProc("GdipWidenPath")
)

// nativePath (GpPath* in/out), pen (GpPen* in/out), matrix (Matrix* in/out), flatness (FLOAT)
r1, _, err := procGdipWidenPath.Call(
	uintptr(nativePath),
	uintptr(pen),
	uintptr(matrix),
	uintptr(math.Float32bits(flatness)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

function GdipWidenPath(
  nativePath: Pointer;   // GpPath* in/out
  pen: Pointer;   // GpPen* in/out
  matrix: Pointer;   // Matrix* in/out
  flatness: Single   // FLOAT
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipWidenPath';

result := DllCall("gdiplus\GdipWidenPath"
    , "Ptr", nativePath   ; GpPath* in/out
    , "Ptr", pen   ; GpPen* in/out
    , "Ptr", matrix   ; Matrix* in/out
    , "Float", flatness   ; FLOAT
    , "Int")   ; return: Status

●GdipWidenPath(nativePath, pen, matrix, flatness) = DLL("gdiplus.dll", "int GdipWidenPath(void*, void*, void*, float)")
# 呼び出し: GdipWidenPath(nativePath, pen, matrix, flatness)
# nativePath : GpPath* in/out -> "void*"
# pen : GpPen* in/out -> "void*"
# matrix : Matrix* in/out -> "void*"
# flatness : FLOAT -> "float"
# 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)。