GetThreadContext

// KERNEL32.dll
#include <windows.h>

BOOL GetThreadContext(
    HANDLE hThread,
    CONTEXT* lpContext
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetThreadContext(
    hThread As IntPtr,   ' HANDLE
    lpContext As IntPtr   ' CONTEXT* in/out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' hThread : HANDLE
' lpContext : CONTEXT* in/out
Declare PtrSafe Function GetThreadContext Lib "kernel32" ( _
    ByVal hThread As LongPtr, _
    ByVal lpContext 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

GetThreadContext = ctypes.windll.kernel32.GetThreadContext
GetThreadContext.restype = wintypes.BOOL
GetThreadContext.argtypes = [
    wintypes.HANDLE,  # hThread : HANDLE
    ctypes.c_void_p,  # lpContext : CONTEXT* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetThreadContext = Fiddle::Function.new(
  lib['GetThreadContext'],
  [
    Fiddle::TYPE_VOIDP,  # hThread : HANDLE
    Fiddle::TYPE_VOIDP,  # lpContext : CONTEXT* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetThreadContext(
        hThread: *mut core::ffi::c_void,  // HANDLE
        lpContext: *mut CONTEXT  // CONTEXT* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool GetThreadContext(IntPtr hThread, IntPtr lpContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetThreadContext' -Namespace Win32 -PassThru
# $api::GetThreadContext(hThread, lpContext)

#uselib "KERNEL32.dll"
#func global GetThreadContext "GetThreadContext" sptr, sptr
; GetThreadContext hThread, varptr(lpContext)   ; 戻り値は stat
; hThread : HANDLE -> "sptr"
; lpContext : CONTEXT* 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。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetThreadContext = kernel32.NewProc("GetThreadContext")
)

// hThread (HANDLE), lpContext (CONTEXT* in/out)
r1, _, err := procGetThreadContext.Call(
	uintptr(hThread),
	uintptr(lpContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetThreadContext(
  hThread: THandle;   // HANDLE
  lpContext: Pointer   // CONTEXT* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetThreadContext';

result := DllCall("KERNEL32\GetThreadContext"
    , "Ptr", hThread   ; HANDLE
    , "Ptr", lpContext   ; CONTEXT* in/out
    , "Int")   ; return: BOOL

●GetThreadContext(hThread, lpContext) = DLL("KERNEL32.dll", "bool GetThreadContext(void*, void*)")
# 呼び出し: GetThreadContext(hThread, lpContext)
# hThread : HANDLE -> "void*"
# lpContext : CONTEXT* 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 "kernel32" fn GetThreadContext(
    hThread: ?*anyopaque, // HANDLE
    lpContext: [*c]CONTEXT // CONTEXT* in/out
) callconv(std.os.windows.WINAPI) i32;

proc GetThreadContext(
    hThread: pointer,  # HANDLE
    lpContext: ptr CONTEXT  # CONTEXT* in/out
): int32 {.importc: "GetThreadContext", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int GetThreadContext(
    void* hThread,   // HANDLE
    CONTEXT* lpContext   // CONTEXT* in/out
);

ccall((:GetThreadContext, "KERNEL32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{CONTEXT}),
      hThread, lpContext)
# hThread : HANDLE -> Ptr{Cvoid}
# lpContext : CONTEXT* in/out -> Ptr{CONTEXT}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GetThreadContext(
    void* hThread,
    void* lpContext);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.GetThreadContext(hThread, lpContext)
-- hThread : HANDLE
-- lpContext : CONTEXT* 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('KERNEL32.dll');
const GetThreadContext = lib.func('__stdcall', 'GetThreadContext', 'int32_t', ['void *', 'void *']);
// GetThreadContext(hThread, lpContext)
// hThread : HANDLE -> 'void *'
// lpContext : CONTEXT* 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("KERNEL32.dll", {
  GetThreadContext: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.GetThreadContext(hThread, lpContext)
// hThread : HANDLE -> "pointer"
// lpContext : CONTEXT* 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 GetThreadContext(
    void* hThread,
    void* lpContext);
C, "KERNEL32.dll");
// $ffi->GetThreadContext(hThread, lpContext);
// hThread : HANDLE
// lpContext : CONTEXT* 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    boolean GetThreadContext(
        Pointer hThread,   // HANDLE
        Pointer lpContext   // CONTEXT* in/out
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun GetThreadContext = GetThreadContext(
    hThread : Void*,   # HANDLE
    lpContext : CONTEXT*   # CONTEXT* 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 GetThreadContextNative = Int32 Function(Pointer<Void>, Pointer<Void>);
typedef GetThreadContextDart = int Function(Pointer<Void>, Pointer<Void>);
final GetThreadContext = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<GetThreadContextNative, GetThreadContextDart>('GetThreadContext');
// hThread : HANDLE -> Pointer<Void>
// lpContext : CONTEXT* in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetThreadContext(
  hThread: THandle;   // HANDLE
  lpContext: Pointer   // CONTEXT* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetThreadContext';

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

foreign import stdcall safe "GetThreadContext"
  c_GetThreadContext :: Ptr () -> Ptr () -> IO CInt
-- hThread : HANDLE -> Ptr ()
-- lpContext : CONTEXT* 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 getthreadcontext =
  foreign "GetThreadContext"
    ((ptr void) @-> (ptr void) @-> returning int32_t)
(* hThread : HANDLE -> (ptr void) *)
(* lpContext : CONTEXT* 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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("GetThreadContext" get-thread-context :convention :stdcall) :int32
  (h-thread :pointer)   ; HANDLE
  (lp-context :pointer))   ; CONTEXT* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetThreadContext = Win32::API::More->new('KERNEL32',
    'BOOL GetThreadContext(HANDLE hThread, LPVOID lpContext)');
# my $ret = $GetThreadContext->Call($hThread, $lpContext);
# hThread : HANDLE -> HANDLE
# lpContext : CONTEXT* 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。