GetMonitorInfoA

// USER32.dll  (ANSI / -A)
#include <windows.h>

BOOL GetMonitorInfoA(
    HMONITOR hMonitor,
    MONITORINFO* lpmi
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetMonitorInfoA(
    hMonitor As IntPtr,   ' HMONITOR
    lpmi As IntPtr   ' MONITORINFO* in/out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' hMonitor : HMONITOR
' lpmi : MONITORINFO* in/out
Declare PtrSafe Function GetMonitorInfoA Lib "user32" ( _
    ByVal hMonitor As LongPtr, _
    ByVal lpmi 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

GetMonitorInfoA = ctypes.windll.user32.GetMonitorInfoA
GetMonitorInfoA.restype = wintypes.BOOL
GetMonitorInfoA.argtypes = [
    wintypes.HANDLE,  # hMonitor : HMONITOR
    ctypes.c_void_p,  # lpmi : MONITORINFO* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetMonitorInfoA = Fiddle::Function.new(
  lib['GetMonitorInfoA'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HMONITOR
    Fiddle::TYPE_VOIDP,  # lpmi : MONITORINFO* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetMonitorInfoA(
        hMonitor: *mut core::ffi::c_void,  // HMONITOR
        lpmi: *mut MONITORINFO  // MONITORINFO* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi)]
public static extern bool GetMonitorInfoA(IntPtr hMonitor, IntPtr lpmi);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetMonitorInfoA' -Namespace Win32 -PassThru
# $api::GetMonitorInfoA(hMonitor, lpmi)

#uselib "USER32.dll"
#func global GetMonitorInfoA "GetMonitorInfoA" sptr, sptr
; GetMonitorInfoA hMonitor, varptr(lpmi)   ; 戻り値は stat
; hMonitor : HMONITOR -> "sptr"
; lpmi : MONITORINFO* 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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procGetMonitorInfoA = user32.NewProc("GetMonitorInfoA")
)

// hMonitor (HMONITOR), lpmi (MONITORINFO* in/out)
r1, _, err := procGetMonitorInfoA.Call(
	uintptr(hMonitor),
	uintptr(lpmi),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetMonitorInfoA(
  hMonitor: THandle;   // HMONITOR
  lpmi: Pointer   // MONITORINFO* in/out
): BOOL; stdcall;
  external 'USER32.dll' name 'GetMonitorInfoA';

result := DllCall("USER32\GetMonitorInfoA"
    , "Ptr", hMonitor   ; HMONITOR
    , "Ptr", lpmi   ; MONITORINFO* in/out
    , "Int")   ; return: BOOL

●GetMonitorInfoA(hMonitor, lpmi) = DLL("USER32.dll", "bool GetMonitorInfoA(void*, void*)")
# 呼び出し: GetMonitorInfoA(hMonitor, lpmi)
# hMonitor : HMONITOR -> "void*"
# lpmi : MONITORINFO* 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 "user32" fn GetMonitorInfoA(
    hMonitor: ?*anyopaque, // HMONITOR
    lpmi: [*c]MONITORINFO // MONITORINFO* in/out
) callconv(std.os.windows.WINAPI) i32;

proc GetMonitorInfoA(
    hMonitor: pointer,  # HMONITOR
    lpmi: ptr MONITORINFO  # MONITORINFO* in/out
): int32 {.importc: "GetMonitorInfoA", stdcall, dynlib: "USER32.dll".}

pragma(lib, "user32");
extern(Windows)
int GetMonitorInfoA(
    void* hMonitor,   // HMONITOR
    MONITORINFO* lpmi   // MONITORINFO* in/out
);

ccall((:GetMonitorInfoA, "USER32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{MONITORINFO}),
      hMonitor, lpmi)
# hMonitor : HMONITOR -> Ptr{Cvoid}
# lpmi : MONITORINFO* in/out -> Ptr{MONITORINFO}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GetMonitorInfoA(
    void* hMonitor,
    void* lpmi);
]]
local user32 = ffi.load("user32")
-- user32.GetMonitorInfoA(hMonitor, lpmi)
-- hMonitor : HMONITOR
-- lpmi : MONITORINFO* 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('USER32.dll');
const GetMonitorInfoA = lib.func('__stdcall', 'GetMonitorInfoA', 'int32_t', ['void *', 'void *']);
// GetMonitorInfoA(hMonitor, lpmi)
// hMonitor : HMONITOR -> 'void *'
// lpmi : MONITORINFO* 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("USER32.dll", {
  GetMonitorInfoA: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.GetMonitorInfoA(hMonitor, lpmi)
// hMonitor : HMONITOR -> "pointer"
// lpmi : MONITORINFO* in/out -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t GetMonitorInfoA(
    void* hMonitor,
    void* lpmi);
C, "USER32.dll");
// $ffi->GetMonitorInfoA(hMonitor, lpmi);
// hMonitor : HMONITOR
// lpmi : MONITORINFO* 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 User32 extends StdCallLibrary {
    User32 INSTANCE = Native.load("user32", User32.class, W32APIOptions.ASCII_OPTIONS);
    boolean GetMonitorInfoA(
        Pointer hMonitor,   // HMONITOR
        Pointer lpmi   // MONITORINFO* in/out
    );
}

@[Link("user32")]
lib LibUSER32
  fun GetMonitorInfoA = GetMonitorInfoA(
    hMonitor : Void*,   # HMONITOR
    lpmi : MONITORINFO*   # MONITORINFO* 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 GetMonitorInfoANative = Int32 Function(Pointer<Void>, Pointer<Void>);
typedef GetMonitorInfoADart = int Function(Pointer<Void>, Pointer<Void>);
final GetMonitorInfoA = DynamicLibrary.open('USER32.dll')
    .lookupFunction<GetMonitorInfoANative, GetMonitorInfoADart>('GetMonitorInfoA');
// hMonitor : HMONITOR -> Pointer<Void>
// lpmi : MONITORINFO* in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetMonitorInfoA(
  hMonitor: THandle;   // HMONITOR
  lpmi: Pointer   // MONITORINFO* in/out
): BOOL; stdcall;
  external 'USER32.dll' name 'GetMonitorInfoA';

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

foreign import stdcall safe "GetMonitorInfoA"
  c_GetMonitorInfoA :: Ptr () -> Ptr () -> IO CInt
-- hMonitor : HMONITOR -> Ptr ()
-- lpmi : MONITORINFO* 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 getmonitorinfoa =
  foreign "GetMonitorInfoA"
    ((ptr void) @-> (ptr void) @-> returning int32_t)
(* hMonitor : HMONITOR -> (ptr void) *)
(* lpmi : MONITORINFO* 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 user32 (t "USER32.dll"))
(cffi:use-foreign-library user32)

(cffi:defcfun ("GetMonitorInfoA" get-monitor-info-a :convention :stdcall) :int32
  (h-monitor :pointer)   ; HMONITOR
  (lpmi :pointer))   ; MONITORINFO* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetMonitorInfoA = Win32::API::More->new('USER32',
    'BOOL GetMonitorInfoA(HANDLE hMonitor, LPVOID lpmi)');
# my $ret = $GetMonitorInfoA->Call($hMonitor, $lpmi);
# hMonitor : HMONITOR -> HANDLE
# lpmi : MONITORINFO* 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。