GetRandomRgn

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

INT GetRandomRgn(
    HDC hdc,
    HRGN hrgn,
    INT i
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function GetRandomRgn(
    hdc As IntPtr,   ' HDC
    hrgn As IntPtr,   ' HRGN
    i As Integer   ' INT
) As Integer
End Function

' hdc : HDC
' hrgn : HRGN
' i : INT
Declare PtrSafe Function GetRandomRgn Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal hrgn As LongPtr, _
    ByVal i 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

GetRandomRgn = ctypes.windll.gdi32.GetRandomRgn
GetRandomRgn.restype = ctypes.c_int
GetRandomRgn.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    wintypes.HANDLE,  # hrgn : HRGN
    ctypes.c_int,  # i : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetRandomRgn = Fiddle::Function.new(
  lib['GetRandomRgn'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # hrgn : HRGN
    Fiddle::TYPE_INT,  # i : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn GetRandomRgn(
        hdc: *mut core::ffi::c_void,  // HDC
        hrgn: *mut core::ffi::c_void,  // HRGN
        i: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern int GetRandomRgn(IntPtr hdc, IntPtr hrgn, int i);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetRandomRgn' -Namespace Win32 -PassThru
# $api::GetRandomRgn(hdc, hrgn, i)

#uselib "GDI32.dll"
#func global GetRandomRgn "GetRandomRgn" sptr, sptr, sptr
; GetRandomRgn hdc, hrgn, i   ; 戻り値は stat
; hdc : HDC -> "sptr"
; hrgn : HRGN -> "sptr"
; i : INT -> "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 GetRandomRgn "GetRandomRgn" sptr, sptr, int
; res = GetRandomRgn(hdc, hrgn, i)
; hdc : HDC -> "sptr"
; hrgn : HRGN -> "sptr"
; i : INT -> "int"

; INT GetRandomRgn(HDC hdc, HRGN hrgn, INT i)
#uselib "GDI32.dll"
#cfunc global GetRandomRgn "GetRandomRgn" intptr, intptr, int
; res = GetRandomRgn(hdc, hrgn, i)
; hdc : HDC -> "intptr"
; hrgn : HRGN -> "intptr"
; i : INT -> "int"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procGetRandomRgn = gdi32.NewProc("GetRandomRgn")
)

// hdc (HDC), hrgn (HRGN), i (INT)
r1, _, err := procGetRandomRgn.Call(
	uintptr(hdc),
	uintptr(hrgn),
	uintptr(i),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetRandomRgn(
  hdc: THandle;   // HDC
  hrgn: THandle;   // HRGN
  i: Integer   // INT
): Integer; stdcall;
  external 'GDI32.dll' name 'GetRandomRgn';

result := DllCall("GDI32\GetRandomRgn"
    , "Ptr", hdc   ; HDC
    , "Ptr", hrgn   ; HRGN
    , "Int", i   ; INT
    , "Int")   ; return: INT

●GetRandomRgn(hdc, hrgn, i) = DLL("GDI32.dll", "int GetRandomRgn(void*, void*, int)")
# 呼び出し: GetRandomRgn(hdc, hrgn, i)
# hdc : HDC -> "void*"
# hrgn : HRGN -> "void*"
# i : INT -> "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)。