wglGetCurrentDC

関数

現在のOpenGLコンテキストに対応するデバイスコンテキストを取得する。

DLLOPENGL32.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

// OPENGL32.dll
#include <windows.h>

HDC wglGetCurrentDC(void);

パラメーターなし。戻り値: HDC

各言語での呼び出し定義

// OPENGL32.dll
#include <windows.h>

HDC wglGetCurrentDC(void);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern IntPtr wglGetCurrentDC();

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Function wglGetCurrentDC() As IntPtr
End Function

Declare PtrSafe Function wglGetCurrentDC Lib "opengl32" () As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

wglGetCurrentDC = ctypes.windll.opengl32.wglGetCurrentDC
wglGetCurrentDC.restype = ctypes.c_void_p
wglGetCurrentDC.argtypes = []

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
wglGetCurrentDC = Fiddle::Function.new(
  lib['wglGetCurrentDC'],
  [],
  Fiddle::TYPE_VOIDP)

#[link(name = "opengl32")]
extern "system" {
    fn wglGetCurrentDC() -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern IntPtr wglGetCurrentDC();
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_wglGetCurrentDC' -Namespace Win32 -PassThru
# $api::wglGetCurrentDC()

#uselib "OPENGL32.dll"
#func global wglGetCurrentDC "wglGetCurrentDC"
; wglGetCurrentDC   ; 戻り値は stat
; ※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 "OPENGL32.dll"
#cfunc global wglGetCurrentDC "wglGetCurrentDC"
; res = wglGetCurrentDC()

; HDC wglGetCurrentDC()
#uselib "OPENGL32.dll"
#cfunc global wglGetCurrentDC "wglGetCurrentDC"
; res = wglGetCurrentDC()

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procwglGetCurrentDC = opengl32.NewProc("wglGetCurrentDC")
)

r1, _, err := procwglGetCurrentDC.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HDC

function wglGetCurrentDC: THandle; stdcall;
  external 'OPENGL32.dll' name 'wglGetCurrentDC';

result := DllCall("OPENGL32\wglGetCurrentDC", "Ptr")

●wglGetCurrentDC() = DLL("OPENGL32.dll", "void* wglGetCurrentDC()")
# 呼び出し: wglGetCurrentDC()
# 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)。