wglGetProcAddress

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

PROC wglGetProcAddress(
    LPCSTR param0
);

<DllImport("OPENGL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function wglGetProcAddress(
    <MarshalAs(UnmanagedType.LPStr)> param0 As String   ' LPCSTR
) As IntPtr
End Function

' param0 : LPCSTR
Declare PtrSafe Function wglGetProcAddress Lib "opengl32" ( _
    ByVal param0 As String) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

wglGetProcAddress = ctypes.windll.opengl32.wglGetProcAddress
wglGetProcAddress.restype = ctypes.c_void_p
wglGetProcAddress.argtypes = [
    wintypes.LPCSTR,  # param0 : LPCSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
wglGetProcAddress = Fiddle::Function.new(
  lib['wglGetProcAddress'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : LPCSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "opengl32")]
extern "system" {
    fn wglGetProcAddress(
        param0: *const u8  // LPCSTR
    ) -> *const core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll", SetLastError = true)]
public static extern IntPtr wglGetProcAddress([MarshalAs(UnmanagedType.LPStr)] string param0);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_wglGetProcAddress' -Namespace Win32 -PassThru
# $api::wglGetProcAddress(param0)

#uselib "OPENGL32.dll"
#func global wglGetProcAddress "wglGetProcAddress" sptr
; wglGetProcAddress param0   ; 戻り値は stat
; param0 : LPCSTR -> "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 "OPENGL32.dll"
#cfunc global wglGetProcAddress "wglGetProcAddress" str
; res = wglGetProcAddress(param0)
; param0 : LPCSTR -> "str"

; PROC wglGetProcAddress(LPCSTR param0)
#uselib "OPENGL32.dll"
#cfunc global wglGetProcAddress "wglGetProcAddress" str
; res = wglGetProcAddress(param0)
; param0 : LPCSTR -> "str"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procwglGetProcAddress = opengl32.NewProc("wglGetProcAddress")
)

// param0 (LPCSTR)
r1, _, err := procwglGetProcAddress.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(param0))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // PROC

function wglGetProcAddress(
  param0: PAnsiChar   // LPCSTR
): Pointer; stdcall;
  external 'OPENGL32.dll' name 'wglGetProcAddress';

result := DllCall("OPENGL32\wglGetProcAddress"
    , "AStr", param0   ; LPCSTR
    , "Ptr")   ; return: PROC

●wglGetProcAddress(param0) = DLL("OPENGL32.dll", "void* wglGetProcAddress(char*)")
# 呼び出し: wglGetProcAddress(param0)
# param0 : LPCSTR -> "char*"
# 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 "opengl32" fn wglGetProcAddress(
    param0: [*c]const u8 // LPCSTR
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc wglGetProcAddress(
    param0: cstring  # LPCSTR
): pointer {.importc: "wglGetProcAddress", stdcall, dynlib: "OPENGL32.dll".}

pragma(lib, "opengl32");
extern(Windows)
void* wglGetProcAddress(
    const(char)* param0   // LPCSTR
);

ccall((:wglGetProcAddress, "OPENGL32.dll"), stdcall, Ptr{Cvoid},
      (Cstring,),
      param0)
# param0 : LPCSTR -> Cstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* wglGetProcAddress(
    const char* param0);
]]
local opengl32 = ffi.load("opengl32")
-- opengl32.wglGetProcAddress(param0)
-- param0 : LPCSTR
-- 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('OPENGL32.dll');
const wglGetProcAddress = lib.func('__stdcall', 'wglGetProcAddress', 'void *', ['str']);
// wglGetProcAddress(param0)
// param0 : LPCSTR -> 'str'
// 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("OPENGL32.dll", {
  wglGetProcAddress: { parameters: ["buffer"], result: "pointer" },
});
// lib.symbols.wglGetProcAddress(param0)
// param0 : LPCSTR -> "buffer"
// 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
void* wglGetProcAddress(
    const char* param0);
C, "OPENGL32.dll");
// $ffi->wglGetProcAddress(param0);
// param0 : LPCSTR
// 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 Opengl32 extends StdCallLibrary {
    Opengl32 INSTANCE = Native.load("opengl32", Opengl32.class);
    Pointer wglGetProcAddress(
        String param0   // LPCSTR
    );
}

@[Link("opengl32")]
lib LibOPENGL32
  fun wglGetProcAddress = wglGetProcAddress(
    param0 : UInt8*   # LPCSTR
  ) : Void*
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 wglGetProcAddressNative = Pointer<Void> Function(Pointer<Utf8>);
typedef wglGetProcAddressDart = Pointer<Void> Function(Pointer<Utf8>);
final wglGetProcAddress = DynamicLibrary.open('OPENGL32.dll')
    .lookupFunction<wglGetProcAddressNative, wglGetProcAddressDart>('wglGetProcAddress');
// param0 : LPCSTR -> Pointer<Utf8>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function wglGetProcAddress(
  param0: PAnsiChar   // LPCSTR
): Pointer; stdcall;
  external 'OPENGL32.dll' name 'wglGetProcAddress';

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

foreign import stdcall safe "wglGetProcAddress"
  c_wglGetProcAddress :: CString -> IO (Ptr ())
-- param0 : LPCSTR -> CString
-- 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 wglgetprocaddress =
  foreign "wglGetProcAddress"
    (string @-> returning (ptr void))
(* param0 : LPCSTR -> string *)
(* 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 opengl32 (t "OPENGL32.dll"))
(cffi:use-foreign-library opengl32)

(cffi:defcfun ("wglGetProcAddress" wgl-get-proc-address :convention :stdcall) :pointer
  (param0 :string))   ; LPCSTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $wglGetProcAddress = Win32::API::More->new('OPENGL32',
    'LPVOID wglGetProcAddress(LPCSTR param0)');
# my $ret = $wglGetProcAddress->Call($param0);
# param0 : LPCSTR -> LPCSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。