IsWindowVisible

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

BOOL IsWindowVisible(
    HWND hWnd
);

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

' hWnd : HWND
Declare PtrSafe Function IsWindowVisible Lib "user32" ( _
    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

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

require 'fiddle'
require 'fiddle/import'

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

#[link(name = "user32")]
extern "system" {
    fn IsWindowVisible(
        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 IsWindowVisible(IntPtr hWnd);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_IsWindowVisible' -Namespace Win32 -PassThru
# $api::IsWindowVisible(hWnd)

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

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

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procIsWindowVisible = user32.NewProc("IsWindowVisible")
)

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

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

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

●IsWindowVisible(hWnd) = DLL("USER32.dll", "bool IsWindowVisible(void*)")
# 呼び出し: IsWindowVisible(hWnd)
# 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)。