EnumThreadWindows

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

BOOL EnumThreadWindows(
    DWORD dwThreadId,
    WNDENUMPROC lpfn,
    LPARAM lParam
);

<DllImport("USER32.dll", ExactSpelling:=True)>
Public Shared Function EnumThreadWindows(
    dwThreadId As UInteger,   ' DWORD
    lpfn As IntPtr,   ' WNDENUMPROC
    lParam As IntPtr   ' LPARAM
) As Boolean
End Function

' dwThreadId : DWORD
' lpfn : WNDENUMPROC
' lParam : LPARAM
Declare PtrSafe Function EnumThreadWindows Lib "user32" ( _
    ByVal dwThreadId As Long, _
    ByVal lpfn As LongPtr, _
    ByVal lParam 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

EnumThreadWindows = ctypes.windll.user32.EnumThreadWindows
EnumThreadWindows.restype = wintypes.BOOL
EnumThreadWindows.argtypes = [
    wintypes.DWORD,  # dwThreadId : DWORD
    ctypes.c_void_p,  # lpfn : WNDENUMPROC
    ctypes.c_ssize_t,  # lParam : LPARAM
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
EnumThreadWindows = Fiddle::Function.new(
  lib['EnumThreadWindows'],
  [
    -Fiddle::TYPE_INT,  # dwThreadId : DWORD
    Fiddle::TYPE_VOIDP,  # lpfn : WNDENUMPROC
    Fiddle::TYPE_INTPTR_T,  # lParam : LPARAM
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn EnumThreadWindows(
        dwThreadId: u32,  // DWORD
        lpfn: *const core::ffi::c_void,  // WNDENUMPROC
        lParam: isize  // LPARAM
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll")]
public static extern bool EnumThreadWindows(uint dwThreadId, IntPtr lpfn, IntPtr lParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_EnumThreadWindows' -Namespace Win32 -PassThru
# $api::EnumThreadWindows(dwThreadId, lpfn, lParam)

#uselib "USER32.dll"
#func global EnumThreadWindows "EnumThreadWindows" sptr, sptr, sptr
; EnumThreadWindows dwThreadId, lpfn, lParam   ; 戻り値は stat
; dwThreadId : DWORD -> "sptr"
; lpfn : WNDENUMPROC -> "sptr"
; lParam : LPARAM -> "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 EnumThreadWindows "EnumThreadWindows" int, sptr, sptr
; res = EnumThreadWindows(dwThreadId, lpfn, lParam)
; dwThreadId : DWORD -> "int"
; lpfn : WNDENUMPROC -> "sptr"
; lParam : LPARAM -> "sptr"

; BOOL EnumThreadWindows(DWORD dwThreadId, WNDENUMPROC lpfn, LPARAM lParam)
#uselib "USER32.dll"
#cfunc global EnumThreadWindows "EnumThreadWindows" int, intptr, intptr
; res = EnumThreadWindows(dwThreadId, lpfn, lParam)
; dwThreadId : DWORD -> "int"
; lpfn : WNDENUMPROC -> "intptr"
; lParam : LPARAM -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procEnumThreadWindows = user32.NewProc("EnumThreadWindows")
)

// dwThreadId (DWORD), lpfn (WNDENUMPROC), lParam (LPARAM)
r1, _, err := procEnumThreadWindows.Call(
	uintptr(dwThreadId),
	uintptr(lpfn),
	uintptr(lParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumThreadWindows(
  dwThreadId: DWORD;   // DWORD
  lpfn: Pointer;   // WNDENUMPROC
  lParam: NativeInt   // LPARAM
): BOOL; stdcall;
  external 'USER32.dll' name 'EnumThreadWindows';

result := DllCall("USER32\EnumThreadWindows"
    , "UInt", dwThreadId   ; DWORD
    , "Ptr", lpfn   ; WNDENUMPROC
    , "Ptr", lParam   ; LPARAM
    , "Int")   ; return: BOOL

●EnumThreadWindows(dwThreadId, lpfn, lParam) = DLL("USER32.dll", "bool EnumThreadWindows(dword, void*, int)")
# 呼び出し: EnumThreadWindows(dwThreadId, lpfn, lParam)
# dwThreadId : DWORD -> "dword"
# lpfn : WNDENUMPROC -> "void*"
# lParam : LPARAM -> "int"
# 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)。