DeleteObject

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

BOOL DeleteObject(
    HGDIOBJ ho
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function DeleteObject(
    ho As IntPtr   ' HGDIOBJ
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' ho : HGDIOBJ
Declare PtrSafe Function DeleteObject Lib "gdi32" ( _
    ByVal ho 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

DeleteObject = ctypes.windll.gdi32.DeleteObject
DeleteObject.restype = wintypes.BOOL
DeleteObject.argtypes = [
    wintypes.HANDLE,  # ho : HGDIOBJ
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
DeleteObject = Fiddle::Function.new(
  lib['DeleteObject'],
  [
    Fiddle::TYPE_VOIDP,  # ho : HGDIOBJ
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn DeleteObject(
        ho: *mut core::ffi::c_void  // HGDIOBJ
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool DeleteObject(IntPtr ho);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_DeleteObject' -Namespace Win32 -PassThru
# $api::DeleteObject(ho)

#uselib "GDI32.dll"
#func global DeleteObject "DeleteObject" sptr
; DeleteObject ho   ; 戻り値は stat
; ho : HGDIOBJ -> "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 DeleteObject "DeleteObject" sptr
; res = DeleteObject(ho)
; ho : HGDIOBJ -> "sptr"

; BOOL DeleteObject(HGDIOBJ ho)
#uselib "GDI32.dll"
#cfunc global DeleteObject "DeleteObject" intptr
; res = DeleteObject(ho)
; ho : HGDIOBJ -> "intptr"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procDeleteObject = gdi32.NewProc("DeleteObject")
)

// ho (HGDIOBJ)
r1, _, err := procDeleteObject.Call(
	uintptr(ho),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function DeleteObject(
  ho: THandle   // HGDIOBJ
): BOOL; stdcall;
  external 'GDI32.dll' name 'DeleteObject';

result := DllCall("GDI32\DeleteObject"
    , "Ptr", ho   ; HGDIOBJ
    , "Int")   ; return: BOOL

●DeleteObject(ho) = DLL("GDI32.dll", "bool DeleteObject(void*)")
# 呼び出し: DeleteObject(ho)
# ho : HGDIOBJ -> "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)。

const std = @import("std");

extern "gdi32" fn DeleteObject(
    ho: ?*anyopaque // HGDIOBJ
) callconv(std.os.windows.WINAPI) i32;

proc DeleteObject(
    ho: pointer  # HGDIOBJ
): int32 {.importc: "DeleteObject", stdcall, dynlib: "GDI32.dll".}

pragma(lib, "gdi32");
extern(Windows)
int DeleteObject(
    void* ho   // HGDIOBJ
);

ccall((:DeleteObject, "GDI32.dll"), stdcall, Int32,
      (Ptr{Cvoid},),
      ho)
# ho : HGDIOBJ -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DeleteObject(
    void* ho);
]]
local gdi32 = ffi.load("gdi32")
-- gdi32.DeleteObject(ho)
-- ho : HGDIOBJ
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('GDI32.dll');
const DeleteObject = lib.func('__stdcall', 'DeleteObject', 'int32_t', ['void *']);
// DeleteObject(ho)
// ho : HGDIOBJ -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("GDI32.dll", {
  DeleteObject: { parameters: ["pointer"], result: "i32" },
});
// lib.symbols.DeleteObject(ho)
// ho : HGDIOBJ -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t DeleteObject(
    void* ho);
C, "GDI32.dll");
// $ffi->DeleteObject(ho);
// ho : HGDIOBJ
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Gdi32 extends StdCallLibrary {
    Gdi32 INSTANCE = Native.load("gdi32", Gdi32.class);
    boolean DeleteObject(
        Pointer ho   // HGDIOBJ
    );
}

@[Link("gdi32")]
lib LibGDI32
  fun DeleteObject = DeleteObject(
    ho : Void*   # HGDIOBJ
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef DeleteObjectNative = Int32 Function(Pointer<Void>);
typedef DeleteObjectDart = int Function(Pointer<Void>);
final DeleteObject = DynamicLibrary.open('GDI32.dll')
    .lookupFunction<DeleteObjectNative, DeleteObjectDart>('DeleteObject');
// ho : HGDIOBJ -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DeleteObject(
  ho: THandle   // HGDIOBJ
): BOOL; stdcall;
  external 'GDI32.dll' name 'DeleteObject';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DeleteObject"
  c_DeleteObject :: Ptr () -> IO CInt
-- ho : HGDIOBJ -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let deleteobject =
  foreign "DeleteObject"
    ((ptr void) @-> returning int32_t)
(* ho : HGDIOBJ -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library gdi32 (t "GDI32.dll"))
(cffi:use-foreign-library gdi32)

(cffi:defcfun ("DeleteObject" delete-object :convention :stdcall) :int32
  (ho :pointer))   ; HGDIOBJ
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DeleteObject = Win32::API::More->new('GDI32',
    'BOOL DeleteObject(HANDLE ho)');
# my $ret = $DeleteObject->Call($ho);
# ho : HGDIOBJ -> HANDLE
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。