GetUserObjectInformationA

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

BOOL GetUserObjectInformationA(
    HANDLE hObj,
    USER_OBJECT_INFORMATION_INDEX nIndex,
    void* pvInfo,   // optional
    DWORD nLength,
    DWORD* lpnLengthNeeded   // optional
);

<DllImport("USER32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetUserObjectInformationA(
    hObj As IntPtr,   ' HANDLE
    nIndex As Integer,   ' USER_OBJECT_INFORMATION_INDEX
    pvInfo As IntPtr,   ' void* optional, out
    nLength As UInteger,   ' DWORD
    lpnLengthNeeded As IntPtr   ' DWORD* optional, out
) As Boolean
End Function

' hObj : HANDLE
' nIndex : USER_OBJECT_INFORMATION_INDEX
' pvInfo : void* optional, out
' nLength : DWORD
' lpnLengthNeeded : DWORD* optional, out
Declare PtrSafe Function GetUserObjectInformationA Lib "user32" ( _
    ByVal hObj As LongPtr, _
    ByVal nIndex As Long, _
    ByVal pvInfo As LongPtr, _
    ByVal nLength As Long, _
    ByVal lpnLengthNeeded 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

GetUserObjectInformationA = ctypes.windll.user32.GetUserObjectInformationA
GetUserObjectInformationA.restype = wintypes.BOOL
GetUserObjectInformationA.argtypes = [
    wintypes.HANDLE,  # hObj : HANDLE
    ctypes.c_int,  # nIndex : USER_OBJECT_INFORMATION_INDEX
    ctypes.POINTER(None),  # pvInfo : void* optional, out
    wintypes.DWORD,  # nLength : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpnLengthNeeded : DWORD* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetUserObjectInformationA = Fiddle::Function.new(
  lib['GetUserObjectInformationA'],
  [
    Fiddle::TYPE_VOIDP,  # hObj : HANDLE
    Fiddle::TYPE_INT,  # nIndex : USER_OBJECT_INFORMATION_INDEX
    Fiddle::TYPE_VOIDP,  # pvInfo : void* optional, out
    -Fiddle::TYPE_INT,  # nLength : DWORD
    Fiddle::TYPE_VOIDP,  # lpnLengthNeeded : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetUserObjectInformationA(
        hObj: *mut core::ffi::c_void,  // HANDLE
        nIndex: i32,  // USER_OBJECT_INFORMATION_INDEX
        pvInfo: *mut (),  // void* optional, out
        nLength: u32,  // DWORD
        lpnLengthNeeded: *mut u32  // DWORD* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool GetUserObjectInformationA(IntPtr hObj, int nIndex, IntPtr pvInfo, uint nLength, IntPtr lpnLengthNeeded);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetUserObjectInformationA' -Namespace Win32 -PassThru
# $api::GetUserObjectInformationA(hObj, nIndex, pvInfo, nLength, lpnLengthNeeded)

#uselib "USER32.dll"
#func global GetUserObjectInformationA "GetUserObjectInformationA" sptr, sptr, sptr, sptr, sptr
; GetUserObjectInformationA hObj, nIndex, pvInfo, nLength, varptr(lpnLengthNeeded)   ; 戻り値は stat
; hObj : HANDLE -> "sptr"
; nIndex : USER_OBJECT_INFORMATION_INDEX -> "sptr"
; pvInfo : void* optional, out -> "sptr"
; nLength : DWORD -> "sptr"
; lpnLengthNeeded : DWORD* optional, 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。

#uselib "USER32.dll"
#cfunc global GetUserObjectInformationA "GetUserObjectInformationA" sptr, int, sptr, int, var
; res = GetUserObjectInformationA(hObj, nIndex, pvInfo, nLength, lpnLengthNeeded)
; hObj : HANDLE -> "sptr"
; nIndex : USER_OBJECT_INFORMATION_INDEX -> "int"
; pvInfo : void* optional, out -> "sptr"
; nLength : DWORD -> "int"
; lpnLengthNeeded : DWORD* optional, 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 GetUserObjectInformationA(HANDLE hObj, USER_OBJECT_INFORMATION_INDEX nIndex, void* pvInfo, DWORD nLength, DWORD* lpnLengthNeeded)
#uselib "USER32.dll"
#cfunc global GetUserObjectInformationA "GetUserObjectInformationA" intptr, int, intptr, int, var
; res = GetUserObjectInformationA(hObj, nIndex, pvInfo, nLength, lpnLengthNeeded)
; hObj : HANDLE -> "intptr"
; nIndex : USER_OBJECT_INFORMATION_INDEX -> "int"
; pvInfo : void* optional, out -> "intptr"
; nLength : DWORD -> "int"
; lpnLengthNeeded : DWORD* optional, 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")
	procGetUserObjectInformationA = user32.NewProc("GetUserObjectInformationA")
)

// hObj (HANDLE), nIndex (USER_OBJECT_INFORMATION_INDEX), pvInfo (void* optional, out), nLength (DWORD), lpnLengthNeeded (DWORD* optional, out)
r1, _, err := procGetUserObjectInformationA.Call(
	uintptr(hObj),
	uintptr(nIndex),
	uintptr(pvInfo),
	uintptr(nLength),
	uintptr(lpnLengthNeeded),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetUserObjectInformationA(
  hObj: THandle;   // HANDLE
  nIndex: Integer;   // USER_OBJECT_INFORMATION_INDEX
  pvInfo: Pointer;   // void* optional, out
  nLength: DWORD;   // DWORD
  lpnLengthNeeded: Pointer   // DWORD* optional, out
): BOOL; stdcall;
  external 'USER32.dll' name 'GetUserObjectInformationA';

result := DllCall("USER32\GetUserObjectInformationA"
    , "Ptr", hObj   ; HANDLE
    , "Int", nIndex   ; USER_OBJECT_INFORMATION_INDEX
    , "Ptr", pvInfo   ; void* optional, out
    , "UInt", nLength   ; DWORD
    , "Ptr", lpnLengthNeeded   ; DWORD* optional, out
    , "Int")   ; return: BOOL

●GetUserObjectInformationA(hObj, nIndex, pvInfo, nLength, lpnLengthNeeded) = DLL("USER32.dll", "bool GetUserObjectInformationA(void*, int, void*, dword, void*)")
# 呼び出し: GetUserObjectInformationA(hObj, nIndex, pvInfo, nLength, lpnLengthNeeded)
# hObj : HANDLE -> "void*"
# nIndex : USER_OBJECT_INFORMATION_INDEX -> "int"
# pvInfo : void* optional, out -> "void*"
# nLength : DWORD -> "dword"
# lpnLengthNeeded : DWORD* optional, 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)。