CombineRgn

// GDI32.dll
#include <windows.h>

GDI_REGION_TYPE CombineRgn(
    HRGN hrgnDst,   // optional
    HRGN hrgnSrc1,   // optional
    HRGN hrgnSrc2,   // optional
    RGN_COMBINE_MODE iMode
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function CombineRgn(
    hrgnDst As IntPtr,   ' HRGN optional
    hrgnSrc1 As IntPtr,   ' HRGN optional
    hrgnSrc2 As IntPtr,   ' HRGN optional
    iMode As Integer   ' RGN_COMBINE_MODE
) As Integer
End Function

' hrgnDst : HRGN optional
' hrgnSrc1 : HRGN optional
' hrgnSrc2 : HRGN optional
' iMode : RGN_COMBINE_MODE
Declare PtrSafe Function CombineRgn Lib "gdi32" ( _
    ByVal hrgnDst As LongPtr, _
    ByVal hrgnSrc1 As LongPtr, _
    ByVal hrgnSrc2 As LongPtr, _
    ByVal iMode 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

CombineRgn = ctypes.windll.gdi32.CombineRgn
CombineRgn.restype = ctypes.c_int
CombineRgn.argtypes = [
    wintypes.HANDLE,  # hrgnDst : HRGN optional
    wintypes.HANDLE,  # hrgnSrc1 : HRGN optional
    wintypes.HANDLE,  # hrgnSrc2 : HRGN optional
    ctypes.c_int,  # iMode : RGN_COMBINE_MODE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
CombineRgn = Fiddle::Function.new(
  lib['CombineRgn'],
  [
    Fiddle::TYPE_VOIDP,  # hrgnDst : HRGN optional
    Fiddle::TYPE_VOIDP,  # hrgnSrc1 : HRGN optional
    Fiddle::TYPE_VOIDP,  # hrgnSrc2 : HRGN optional
    Fiddle::TYPE_INT,  # iMode : RGN_COMBINE_MODE
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn CombineRgn(
        hrgnDst: *mut core::ffi::c_void,  // HRGN optional
        hrgnSrc1: *mut core::ffi::c_void,  // HRGN optional
        hrgnSrc2: *mut core::ffi::c_void,  // HRGN optional
        iMode: i32  // RGN_COMBINE_MODE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern int CombineRgn(IntPtr hrgnDst, IntPtr hrgnSrc1, IntPtr hrgnSrc2, int iMode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_CombineRgn' -Namespace Win32 -PassThru
# $api::CombineRgn(hrgnDst, hrgnSrc1, hrgnSrc2, iMode)

#uselib "GDI32.dll"
#func global CombineRgn "CombineRgn" sptr, sptr, sptr, sptr
; CombineRgn hrgnDst, hrgnSrc1, hrgnSrc2, iMode   ; 戻り値は stat
; hrgnDst : HRGN optional -> "sptr"
; hrgnSrc1 : HRGN optional -> "sptr"
; hrgnSrc2 : HRGN optional -> "sptr"
; iMode : RGN_COMBINE_MODE -> "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 "GDI32.dll"
#cfunc global CombineRgn "CombineRgn" sptr, sptr, sptr, int
; res = CombineRgn(hrgnDst, hrgnSrc1, hrgnSrc2, iMode)
; hrgnDst : HRGN optional -> "sptr"
; hrgnSrc1 : HRGN optional -> "sptr"
; hrgnSrc2 : HRGN optional -> "sptr"
; iMode : RGN_COMBINE_MODE -> "int"

; GDI_REGION_TYPE CombineRgn(HRGN hrgnDst, HRGN hrgnSrc1, HRGN hrgnSrc2, RGN_COMBINE_MODE iMode)
#uselib "GDI32.dll"
#cfunc global CombineRgn "CombineRgn" intptr, intptr, intptr, int
; res = CombineRgn(hrgnDst, hrgnSrc1, hrgnSrc2, iMode)
; hrgnDst : HRGN optional -> "intptr"
; hrgnSrc1 : HRGN optional -> "intptr"
; hrgnSrc2 : HRGN optional -> "intptr"
; iMode : RGN_COMBINE_MODE -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procCombineRgn = gdi32.NewProc("CombineRgn")
)

// hrgnDst (HRGN optional), hrgnSrc1 (HRGN optional), hrgnSrc2 (HRGN optional), iMode (RGN_COMBINE_MODE)
r1, _, err := procCombineRgn.Call(
	uintptr(hrgnDst),
	uintptr(hrgnSrc1),
	uintptr(hrgnSrc2),
	uintptr(iMode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // GDI_REGION_TYPE

function CombineRgn(
  hrgnDst: THandle;   // HRGN optional
  hrgnSrc1: THandle;   // HRGN optional
  hrgnSrc2: THandle;   // HRGN optional
  iMode: Integer   // RGN_COMBINE_MODE
): Integer; stdcall;
  external 'GDI32.dll' name 'CombineRgn';

result := DllCall("GDI32\CombineRgn"
    , "Ptr", hrgnDst   ; HRGN optional
    , "Ptr", hrgnSrc1   ; HRGN optional
    , "Ptr", hrgnSrc2   ; HRGN optional
    , "Int", iMode   ; RGN_COMBINE_MODE
    , "Int")   ; return: GDI_REGION_TYPE

●CombineRgn(hrgnDst, hrgnSrc1, hrgnSrc2, iMode) = DLL("GDI32.dll", "int CombineRgn(void*, void*, void*, int)")
# 呼び出し: CombineRgn(hrgnDst, hrgnSrc1, hrgnSrc2, iMode)
# hrgnDst : HRGN optional -> "void*"
# hrgnSrc1 : HRGN optional -> "void*"
# hrgnSrc2 : HRGN optional -> "void*"
# iMode : RGN_COMBINE_MODE -> "int"
# 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)。