GdipCreatePathGradientFromPath

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

Status GdipCreatePathGradientFromPath(
    const GpPath* path,
    GpPathGradient** polyGradient
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipCreatePathGradientFromPath(
    path As IntPtr,   ' GpPath*
    polyGradient As IntPtr   ' GpPathGradient** in/out
) As Integer
End Function

' path : GpPath*
' polyGradient : GpPathGradient** in/out
Declare PtrSafe Function GdipCreatePathGradientFromPath Lib "gdiplus" ( _
    ByVal path As LongPtr, _
    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

GdipCreatePathGradientFromPath = ctypes.windll.gdiplus.GdipCreatePathGradientFromPath
GdipCreatePathGradientFromPath.restype = ctypes.c_int
GdipCreatePathGradientFromPath.argtypes = [
    ctypes.c_void_p,  # path : GpPath*
    ctypes.c_void_p,  # polyGradient : GpPathGradient** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipCreatePathGradientFromPath = Fiddle::Function.new(
  lib['GdipCreatePathGradientFromPath'],
  [
    Fiddle::TYPE_VOIDP,  # path : GpPath*
    Fiddle::TYPE_VOIDP,  # polyGradient : GpPathGradient** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipCreatePathGradientFromPath(
        path: *const GpPath,  // GpPath*
        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 GdipCreatePathGradientFromPath(IntPtr path, IntPtr polyGradient);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipCreatePathGradientFromPath' -Namespace Win32 -PassThru
# $api::GdipCreatePathGradientFromPath(path, polyGradient)

#uselib "gdiplus.dll"
#func global GdipCreatePathGradientFromPath "GdipCreatePathGradientFromPath" sptr, sptr
; GdipCreatePathGradientFromPath varptr(path), varptr(polyGradient)   ; 戻り値は stat
; path : GpPath* -> "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 GdipCreatePathGradientFromPath "GdipCreatePathGradientFromPath" var, var
; res = GdipCreatePathGradientFromPath(path, polyGradient)
; path : GpPath* -> "var"
; 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 GdipCreatePathGradientFromPath(GpPath* path, GpPathGradient** polyGradient)
#uselib "gdiplus.dll"
#cfunc global GdipCreatePathGradientFromPath "GdipCreatePathGradientFromPath" var, var
; res = GdipCreatePathGradientFromPath(path, polyGradient)
; path : GpPath* -> "var"
; 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")
	procGdipCreatePathGradientFromPath = gdiplus.NewProc("GdipCreatePathGradientFromPath")
)

// path (GpPath*), polyGradient (GpPathGradient** in/out)
r1, _, err := procGdipCreatePathGradientFromPath.Call(
	uintptr(path),
	uintptr(polyGradient),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipCreatePathGradientFromPath(
  path: Pointer;   // GpPath*
  polyGradient: Pointer   // GpPathGradient** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipCreatePathGradientFromPath';

result := DllCall("gdiplus\GdipCreatePathGradientFromPath"
    , "Ptr", path   ; GpPath*
    , "Ptr", polyGradient   ; GpPathGradient** in/out
    , "Int")   ; return: Status

●GdipCreatePathGradientFromPath(path, polyGradient) = DLL("gdiplus.dll", "int GdipCreatePathGradientFromPath(void*, void*)")
# 呼び出し: GdipCreatePathGradientFromPath(path, polyGradient)
# path : GpPath* -> "void*"
# 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)。