GetMonitorInfoW

// USER32.dll  (Unicode / -W)
#include <windows.h>

BOOL GetMonitorInfoW(
    HMONITOR hMonitor,
    MONITORINFO* lpmi
);

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

' hMonitor : HMONITOR
' lpmi : MONITORINFO* in/out
Declare PtrSafe Function GetMonitorInfoW Lib "user32" ( _
    ByVal hMonitor As LongPtr, _
    ByVal lpmi As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

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

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetMonitorInfoW = Fiddle::Function.new(
  lib['GetMonitorInfoW'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HMONITOR
    Fiddle::TYPE_VOIDP,  # lpmi : MONITORINFO* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "user32")]
extern "system" {
    fn GetMonitorInfoW(
        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.Unicode)]
public static extern bool GetMonitorInfoW(IntPtr hMonitor, IntPtr lpmi);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetMonitorInfoW' -Namespace Win32 -PassThru
# $api::GetMonitorInfoW(hMonitor, lpmi)

#uselib "USER32.dll"
#func global GetMonitorInfoW "GetMonitorInfoW" wptr, wptr
; GetMonitorInfoW hMonitor, varptr(lpmi)   ; 戻り値は stat
; hMonitor : HMONITOR -> "wptr"
; lpmi : MONITORINFO* in/out -> "wptr"
; ※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 "USER32.dll"
#cfunc global GetMonitorInfoW "GetMonitorInfoW" sptr, var
; res = GetMonitorInfoW(hMonitor, lpmi)
; hMonitor : HMONITOR -> "sptr"
; lpmi : MONITORINFO* 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。

; BOOL GetMonitorInfoW(HMONITOR hMonitor, MONITORINFO* lpmi)
#uselib "USER32.dll"
#cfunc global GetMonitorInfoW "GetMonitorInfoW" intptr, var
; res = GetMonitorInfoW(hMonitor, lpmi)
; hMonitor : HMONITOR -> "intptr"
; lpmi : MONITORINFO* 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 (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procGetMonitorInfoW = user32.NewProc("GetMonitorInfoW")
)

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

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

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

●GetMonitorInfoW(hMonitor, lpmi) = DLL("USER32.dll", "bool GetMonitorInfoW(void*, void*)")
# 呼び出し: GetMonitorInfoW(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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。