GdipIsEmptyRegion

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

Status GdipIsEmptyRegion(
    GpRegion* region,
    GpGraphics* graphics,
    BOOL* result
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipIsEmptyRegion(
    region As IntPtr,   ' GpRegion* in/out
    graphics As IntPtr,   ' GpGraphics* in/out
    ByRef result As Integer   ' BOOL* in/out
) As Integer
End Function

' region : GpRegion* in/out
' graphics : GpGraphics* in/out
' result : BOOL* in/out
Declare PtrSafe Function GdipIsEmptyRegion Lib "gdiplus" ( _
    ByVal region As LongPtr, _
    ByVal graphics As LongPtr, _
    ByRef result 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

GdipIsEmptyRegion = ctypes.windll.gdiplus.GdipIsEmptyRegion
GdipIsEmptyRegion.restype = ctypes.c_int
GdipIsEmptyRegion.argtypes = [
    ctypes.c_void_p,  # region : GpRegion* in/out
    ctypes.c_void_p,  # graphics : GpGraphics* in/out
    ctypes.c_void_p,  # result : BOOL* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipIsEmptyRegion = Fiddle::Function.new(
  lib['GdipIsEmptyRegion'],
  [
    Fiddle::TYPE_VOIDP,  # region : GpRegion* in/out
    Fiddle::TYPE_VOIDP,  # graphics : GpGraphics* in/out
    Fiddle::TYPE_VOIDP,  # result : BOOL* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipIsEmptyRegion(
        region: *mut GpRegion,  // GpRegion* in/out
        graphics: *mut GpGraphics,  // GpGraphics* in/out
        result: *mut i32  // BOOL* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipIsEmptyRegion(IntPtr region, IntPtr graphics, ref int result);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipIsEmptyRegion' -Namespace Win32 -PassThru
# $api::GdipIsEmptyRegion(region, graphics, result)

#uselib "gdiplus.dll"
#func global GdipIsEmptyRegion "GdipIsEmptyRegion" sptr, sptr, sptr
; GdipIsEmptyRegion varptr(region), varptr(graphics), result   ; 戻り値は stat
; region : GpRegion* in/out -> "sptr"
; graphics : GpGraphics* in/out -> "sptr"
; result : BOOL* 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 GdipIsEmptyRegion "GdipIsEmptyRegion" var, var, int
; res = GdipIsEmptyRegion(region, graphics, result)
; region : GpRegion* in/out -> "var"
; graphics : GpGraphics* in/out -> "var"
; result : BOOL* in/out -> "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 GdipIsEmptyRegion(GpRegion* region, GpGraphics* graphics, BOOL* result)
#uselib "gdiplus.dll"
#cfunc global GdipIsEmptyRegion "GdipIsEmptyRegion" var, var, int
; res = GdipIsEmptyRegion(region, graphics, result)
; region : GpRegion* in/out -> "var"
; graphics : GpGraphics* in/out -> "var"
; result : BOOL* in/out -> "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")
	procGdipIsEmptyRegion = gdiplus.NewProc("GdipIsEmptyRegion")
)

// region (GpRegion* in/out), graphics (GpGraphics* in/out), result (BOOL* in/out)
r1, _, err := procGdipIsEmptyRegion.Call(
	uintptr(region),
	uintptr(graphics),
	uintptr(result),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipIsEmptyRegion(
  region: Pointer;   // GpRegion* in/out
  graphics: Pointer;   // GpGraphics* in/out
  result: Pointer   // BOOL* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipIsEmptyRegion';

result := DllCall("gdiplus\GdipIsEmptyRegion"
    , "Ptr", region   ; GpRegion* in/out
    , "Ptr", graphics   ; GpGraphics* in/out
    , "Ptr", result   ; BOOL* in/out
    , "Int")   ; return: Status

●GdipIsEmptyRegion(region, graphics, result) = DLL("gdiplus.dll", "int GdipIsEmptyRegion(void*, void*, void*)")
# 呼び出し: GdipIsEmptyRegion(region, graphics, result)
# region : GpRegion* in/out -> "void*"
# graphics : GpGraphics* in/out -> "void*"
# result : BOOL* 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)。