GdipCreatePathGradient

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

Status GdipCreatePathGradient(
    const PointF* points,
    INT count,
    WrapMode wrapMode,
    GpPathGradient** polyGradient
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipCreatePathGradient(
    points As IntPtr,   ' PointF*
    count As Integer,   ' INT
    wrapMode As Integer,   ' WrapMode
    polyGradient As IntPtr   ' GpPathGradient** in/out
) As Integer
End Function

' points : PointF*
' count : INT
' wrapMode : WrapMode
' polyGradient : GpPathGradient** in/out
Declare PtrSafe Function GdipCreatePathGradient Lib "gdiplus" ( _
    ByVal points As LongPtr, _
    ByVal count As Long, _
    ByVal wrapMode As Long, _
    ByVal polyGradient As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GdipCreatePathGradient = ctypes.windll.gdiplus.GdipCreatePathGradient
GdipCreatePathGradient.restype = ctypes.c_int
GdipCreatePathGradient.argtypes = [
    ctypes.c_void_p,  # points : PointF*
    ctypes.c_int,  # count : INT
    ctypes.c_int,  # wrapMode : WrapMode
    ctypes.c_void_p,  # polyGradient : GpPathGradient** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipCreatePathGradient = Fiddle::Function.new(
  lib['GdipCreatePathGradient'],
  [
    Fiddle::TYPE_VOIDP,  # points : PointF*
    Fiddle::TYPE_INT,  # count : INT
    Fiddle::TYPE_INT,  # wrapMode : WrapMode
    Fiddle::TYPE_VOIDP,  # polyGradient : GpPathGradient** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipCreatePathGradient(
        points: *const PointF,  // PointF*
        count: i32,  // INT
        wrapMode: i32,  // WrapMode
        polyGradient: *mut *mut GpPathGradient  // GpPathGradient** in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipCreatePathGradient(IntPtr points, int count, int wrapMode, IntPtr polyGradient);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipCreatePathGradient' -Namespace Win32 -PassThru
# $api::GdipCreatePathGradient(points, count, wrapMode, polyGradient)

#uselib "gdiplus.dll"
#func global GdipCreatePathGradient "GdipCreatePathGradient" sptr, sptr, sptr, sptr
; GdipCreatePathGradient varptr(points), count, wrapMode, varptr(polyGradient)   ; 戻り値は stat
; points : PointF* -> "sptr"
; count : INT -> "sptr"
; wrapMode : WrapMode -> "sptr"
; polyGradient : GpPathGradient** in/out -> "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 GdipCreatePathGradient "GdipCreatePathGradient" var, int, int, var
; res = GdipCreatePathGradient(points, count, wrapMode, polyGradient)
; points : PointF* -> "var"
; count : INT -> "int"
; wrapMode : WrapMode -> "int"
; polyGradient : GpPathGradient** in/out -> "var"
; ※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 GdipCreatePathGradient(PointF* points, INT count, WrapMode wrapMode, GpPathGradient** polyGradient)
#uselib "gdiplus.dll"
#cfunc global GdipCreatePathGradient "GdipCreatePathGradient" var, int, int, var
; res = GdipCreatePathGradient(points, count, wrapMode, polyGradient)
; points : PointF* -> "var"
; count : INT -> "int"
; wrapMode : WrapMode -> "int"
; polyGradient : GpPathGradient** in/out -> "var"
; ※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")
	procGdipCreatePathGradient = gdiplus.NewProc("GdipCreatePathGradient")
)

// points (PointF*), count (INT), wrapMode (WrapMode), polyGradient (GpPathGradient** in/out)
r1, _, err := procGdipCreatePathGradient.Call(
	uintptr(points),
	uintptr(count),
	uintptr(wrapMode),
	uintptr(polyGradient),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipCreatePathGradient(
  points: Pointer;   // PointF*
  count: Integer;   // INT
  wrapMode: Integer;   // WrapMode
  polyGradient: Pointer   // GpPathGradient** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipCreatePathGradient';

result := DllCall("gdiplus\GdipCreatePathGradient"
    , "Ptr", points   ; PointF*
    , "Int", count   ; INT
    , "Int", wrapMode   ; WrapMode
    , "Ptr", polyGradient   ; GpPathGradient** in/out
    , "Int")   ; return: Status

●GdipCreatePathGradient(points, count, wrapMode, polyGradient) = DLL("gdiplus.dll", "int GdipCreatePathGradient(void*, int, int, void*)")
# 呼び出し: GdipCreatePathGradient(points, count, wrapMode, polyGradient)
# points : PointF* -> "void*"
# count : INT -> "int"
# wrapMode : WrapMode -> "int"
# polyGradient : GpPathGradient** in/out -> "void*"
# 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)。