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ホームGraphics.GdiPlus › GdipCreateFromHWND

GdipCreateFromHWND

関数
ウィンドウハンドルからGraphicsオブジェクトを作成する。
DLLgdiplus.dll呼出規約winapi

シグネチャ

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

Status GdipCreateFromHWND(
    HWND hwnd,
    GpGraphics** graphics
);

パラメーター

名前方向説明
hwndHWNDin描画先となるウィンドウのハンドル(HWND)。
graphicsGpGraphics**inout生成されたGpGraphicsオブジェクトを受け取る出力先ポインタのアドレス。

戻り値の型: Status

各言語での呼び出し定義

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

Status GdipCreateFromHWND(
    HWND hwnd,
    GpGraphics** graphics
);
[DllImport("gdiplus.dll", ExactSpelling = true)]
static extern int GdipCreateFromHWND(
    IntPtr hwnd,   // HWND
    IntPtr graphics   // GpGraphics** in/out
);
<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipCreateFromHWND(
    hwnd As IntPtr,   ' HWND
    graphics As IntPtr   ' GpGraphics** in/out
) As Integer
End Function
' hwnd : HWND
' graphics : GpGraphics** in/out
Declare PtrSafe Function GdipCreateFromHWND Lib "gdiplus" ( _
    ByVal hwnd As LongPtr, _
    ByVal graphics 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

GdipCreateFromHWND = ctypes.windll.gdiplus.GdipCreateFromHWND
GdipCreateFromHWND.restype = ctypes.c_int
GdipCreateFromHWND.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    ctypes.c_void_p,  # graphics : GpGraphics** in/out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipCreateFromHWND = Fiddle::Function.new(
  lib['GdipCreateFromHWND'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_VOIDP,  # graphics : GpGraphics** in/out
  ],
  Fiddle::TYPE_INT)
#[link(name = "gdiplus")]
extern "system" {
    fn GdipCreateFromHWND(
        hwnd: *mut core::ffi::c_void,  // HWND
        graphics: *mut *mut GpGraphics  // GpGraphics** in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipCreateFromHWND(IntPtr hwnd, IntPtr graphics);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipCreateFromHWND' -Namespace Win32 -PassThru
# $api::GdipCreateFromHWND(hwnd, graphics)
#uselib "gdiplus.dll"
#func global GdipCreateFromHWND "GdipCreateFromHWND" sptr, sptr
; GdipCreateFromHWND hwnd, varptr(graphics)   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; graphics : GpGraphics** 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。
出力引数:
#uselib "gdiplus.dll"
#cfunc global GdipCreateFromHWND "GdipCreateFromHWND" sptr, var
; res = GdipCreateFromHWND(hwnd, graphics)
; hwnd : HWND -> "sptr"
; graphics : GpGraphics** 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。
出力引数:
; Status GdipCreateFromHWND(HWND hwnd, GpGraphics** graphics)
#uselib "gdiplus.dll"
#cfunc global GdipCreateFromHWND "GdipCreateFromHWND" intptr, var
; res = GdipCreateFromHWND(hwnd, graphics)
; hwnd : HWND -> "intptr"
; graphics : GpGraphics** 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")
	procGdipCreateFromHWND = gdiplus.NewProc("GdipCreateFromHWND")
)

// hwnd (HWND), graphics (GpGraphics** in/out)
r1, _, err := procGdipCreateFromHWND.Call(
	uintptr(hwnd),
	uintptr(graphics),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status
function GdipCreateFromHWND(
  hwnd: THandle;   // HWND
  graphics: Pointer   // GpGraphics** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipCreateFromHWND';
result := DllCall("gdiplus\GdipCreateFromHWND"
    , "Ptr", hwnd   ; HWND
    , "Ptr", graphics   ; GpGraphics** in/out
    , "Int")   ; return: Status
●GdipCreateFromHWND(hwnd, graphics) = DLL("gdiplus.dll", "int GdipCreateFromHWND(void*, void*)")
# 呼び出し: GdipCreateFromHWND(hwnd, graphics)
# hwnd : HWND -> "void*"
# graphics : GpGraphics** 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)。
const std = @import("std");

extern "gdiplus" fn GdipCreateFromHWND(
    hwnd: ?*anyopaque, // HWND
    graphics: [*c][*c]GpGraphics // GpGraphics** in/out
) callconv(std.os.windows.WINAPI) i32;
proc GdipCreateFromHWND(
    hwnd: pointer,  # HWND
    graphics: ptr GpGraphics  # GpGraphics** in/out
): int32 {.importc: "GdipCreateFromHWND", stdcall, dynlib: "gdiplus.dll".}
pragma(lib, "gdiplus");
extern(Windows)
int GdipCreateFromHWND(
    void* hwnd,   // HWND
    GpGraphics** graphics   // GpGraphics** in/out
);
ccall((:GdipCreateFromHWND, "gdiplus.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{GpGraphics}),
      hwnd, graphics)
# hwnd : HWND -> Ptr{Cvoid}
# graphics : GpGraphics** in/out -> Ptr{GpGraphics}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t GdipCreateFromHWND(
    void* hwnd,
    void* graphics);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipCreateFromHWND(hwnd, graphics)
-- hwnd : HWND
-- graphics : GpGraphics** in/out
-- 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('gdiplus.dll');
const GdipCreateFromHWND = lib.func('__stdcall', 'GdipCreateFromHWND', 'int32_t', ['void *', 'void *']);
// GdipCreateFromHWND(hwnd, graphics)
// hwnd : HWND -> 'void *'
// graphics : GpGraphics** in/out -> '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("gdiplus.dll", {
  GdipCreateFromHWND: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.GdipCreateFromHWND(hwnd, graphics)
// hwnd : HWND -> "pointer"
// graphics : GpGraphics** in/out -> "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 GdipCreateFromHWND(
    void* hwnd,
    void* graphics);
C, "gdiplus.dll");
// $ffi->GdipCreateFromHWND(hwnd, graphics);
// hwnd : HWND
// graphics : GpGraphics** in/out
// 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 Gdiplus extends StdCallLibrary {
    Gdiplus INSTANCE = Native.load("gdiplus", Gdiplus.class);
    int GdipCreateFromHWND(
        Pointer hwnd,   // HWND
        Pointer graphics   // GpGraphics** in/out
    );
}
@[Link("gdiplus")]
lib Libgdiplus
  fun GdipCreateFromHWND = GdipCreateFromHWND(
    hwnd : Void*,   # HWND
    graphics : GpGraphics**   # GpGraphics** in/out
  ) : 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 GdipCreateFromHWNDNative = Int32 Function(Pointer<Void>, Pointer<Void>);
typedef GdipCreateFromHWNDDart = int Function(Pointer<Void>, Pointer<Void>);
final GdipCreateFromHWND = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipCreateFromHWNDNative, GdipCreateFromHWNDDart>('GdipCreateFromHWND');
// hwnd : HWND -> Pointer<Void>
// graphics : GpGraphics** in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function GdipCreateFromHWND(
  hwnd: THandle;   // HWND
  graphics: Pointer   // GpGraphics** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipCreateFromHWND';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "GdipCreateFromHWND"
  c_GdipCreateFromHWND :: Ptr () -> Ptr () -> IO Int32
-- hwnd : HWND -> Ptr ()
-- graphics : GpGraphics** in/out -> 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 gdipcreatefromhwnd =
  foreign "GdipCreateFromHWND"
    ((ptr void) @-> (ptr void) @-> returning int32_t)
(* hwnd : HWND -> (ptr void) *)
(* graphics : GpGraphics** in/out -> (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 gdiplus (t "gdiplus.dll"))
(cffi:use-foreign-library gdiplus)

(cffi:defcfun ("GdipCreateFromHWND" gdip-create-from-hwnd :convention :stdcall) :int32
  (hwnd :pointer)   ; HWND
  (graphics :pointer))   ; GpGraphics** in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $GdipCreateFromHWND = Win32::API::More->new('gdiplus',
    'int GdipCreateFromHWND(HANDLE hwnd, LPVOID graphics)');
# my $ret = $GdipCreateFromHWND->Call($hwnd, $graphics);
# hwnd : HWND -> HANDLE
# graphics : GpGraphics** in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

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