IsChild

// USER32.dll
#include <windows.h>

BOOL IsChild(
    HWND hWndParent,
    HWND hWnd
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function IsChild(
    hWndParent As IntPtr,   ' HWND
    hWnd As IntPtr   ' HWND
) As Boolean
End Function

' hWndParent : HWND
' hWnd : HWND
Declare PtrSafe Function IsChild Lib "user32" ( _
    ByVal hWndParent As LongPtr, _
    ByVal hWnd 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

IsChild = ctypes.windll.user32.IsChild
IsChild.restype = wintypes.BOOL
IsChild.argtypes = [
    wintypes.HANDLE,  # hWndParent : HWND
    wintypes.HANDLE,  # hWnd : HWND
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
IsChild = Fiddle::Function.new(
  lib['IsChild'],
  [
    Fiddle::TYPE_VOIDP,  # hWndParent : HWND
    Fiddle::TYPE_VOIDP,  # hWnd : HWND
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn IsChild(
        hWndParent: *mut core::ffi::c_void,  // HWND
        hWnd: *mut core::ffi::c_void  // HWND
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll")]
public static extern bool IsChild(IntPtr hWndParent, IntPtr hWnd);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_IsChild' -Namespace Win32 -PassThru
# $api::IsChild(hWndParent, hWnd)

#uselib "USER32.dll"
#func global IsChild "IsChild" sptr, sptr
; IsChild hWndParent, hWnd   ; 戻り値は stat
; hWndParent : HWND -> "sptr"
; hWnd : HWND -> "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 IsChild "IsChild" sptr, sptr
; res = IsChild(hWndParent, hWnd)
; hWndParent : HWND -> "sptr"
; hWnd : HWND -> "sptr"

; BOOL IsChild(HWND hWndParent, HWND hWnd)
#uselib "USER32.dll"
#cfunc global IsChild "IsChild" intptr, intptr
; res = IsChild(hWndParent, hWnd)
; hWndParent : HWND -> "intptr"
; hWnd : HWND -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procIsChild = user32.NewProc("IsChild")
)

// hWndParent (HWND), hWnd (HWND)
r1, _, err := procIsChild.Call(
	uintptr(hWndParent),
	uintptr(hWnd),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function IsChild(
  hWndParent: THandle;   // HWND
  hWnd: THandle   // HWND
): BOOL; stdcall;
  external 'USER32.dll' name 'IsChild';

result := DllCall("USER32\IsChild"
    , "Ptr", hWndParent   ; HWND
    , "Ptr", hWnd   ; HWND
    , "Int")   ; return: BOOL

●IsChild(hWndParent, hWnd) = DLL("USER32.dll", "bool IsChild(void*, void*)")
# 呼び出し: IsChild(hWndParent, hWnd)
# hWndParent : HWND -> "void*"
# hWnd : HWND -> "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)。