GdipGetRegionDataSize

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

Status GdipGetRegionDataSize(
    GpRegion* region,
    DWORD* bufferSize
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetRegionDataSize(
    region As IntPtr,   ' GpRegion* in/out
    ByRef bufferSize As UInteger   ' DWORD* in/out
) As Integer
End Function

' region : GpRegion* in/out
' bufferSize : DWORD* in/out
Declare PtrSafe Function GdipGetRegionDataSize Lib "gdiplus" ( _
    ByVal region As LongPtr, _
    ByRef bufferSize 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

GdipGetRegionDataSize = ctypes.windll.gdiplus.GdipGetRegionDataSize
GdipGetRegionDataSize.restype = ctypes.c_int
GdipGetRegionDataSize.argtypes = [
    ctypes.c_void_p,  # region : GpRegion* in/out
    ctypes.POINTER(wintypes.DWORD),  # bufferSize : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetRegionDataSize = Fiddle::Function.new(
  lib['GdipGetRegionDataSize'],
  [
    Fiddle::TYPE_VOIDP,  # region : GpRegion* in/out
    Fiddle::TYPE_VOIDP,  # bufferSize : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipGetRegionDataSize(
        region: *mut GpRegion,  // GpRegion* in/out
        bufferSize: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "gdiplus.dll"
#func global GdipGetRegionDataSize "GdipGetRegionDataSize" sptr, sptr
; GdipGetRegionDataSize varptr(region), varptr(bufferSize)   ; 戻り値は stat
; region : GpRegion* in/out -> "sptr"
; bufferSize : DWORD* 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 GdipGetRegionDataSize "GdipGetRegionDataSize" var, var
; res = GdipGetRegionDataSize(region, bufferSize)
; region : GpRegion* in/out -> "var"
; bufferSize : DWORD* 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 GdipGetRegionDataSize(GpRegion* region, DWORD* bufferSize)
#uselib "gdiplus.dll"
#cfunc global GdipGetRegionDataSize "GdipGetRegionDataSize" var, var
; res = GdipGetRegionDataSize(region, bufferSize)
; region : GpRegion* in/out -> "var"
; bufferSize : DWORD* 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")
	procGdipGetRegionDataSize = gdiplus.NewProc("GdipGetRegionDataSize")
)

// region (GpRegion* in/out), bufferSize (DWORD* in/out)
r1, _, err := procGdipGetRegionDataSize.Call(
	uintptr(region),
	uintptr(bufferSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetRegionDataSize(
  region: Pointer;   // GpRegion* in/out
  bufferSize: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetRegionDataSize';

result := DllCall("gdiplus\GdipGetRegionDataSize"
    , "Ptr", region   ; GpRegion* in/out
    , "Ptr", bufferSize   ; DWORD* in/out
    , "Int")   ; return: Status

●GdipGetRegionDataSize(region, bufferSize) = DLL("gdiplus.dll", "int GdipGetRegionDataSize(void*, void*)")
# 呼び出し: GdipGetRegionDataSize(region, bufferSize)
# region : GpRegion* in/out -> "void*"
# bufferSize : DWORD* 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)。