WinHttpSetStatusCallback

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

WINHTTP_STATUS_CALLBACK WinHttpSetStatusCallback(
    void* hInternet,
    WINHTTP_STATUS_CALLBACK lpfnInternetCallback,
    DWORD dwNotificationFlags,
    UINT_PTR dwReserved
);

<DllImport("WINHTTP.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WinHttpSetStatusCallback(
    hInternet As IntPtr,   ' void* in/out
    lpfnInternetCallback As IntPtr,   ' WINHTTP_STATUS_CALLBACK
    dwNotificationFlags As UInteger,   ' DWORD
    dwReserved As UIntPtr   ' UINT_PTR
) As IntPtr
End Function

' hInternet : void* in/out
' lpfnInternetCallback : WINHTTP_STATUS_CALLBACK
' dwNotificationFlags : DWORD
' dwReserved : UINT_PTR
Declare PtrSafe Function WinHttpSetStatusCallback Lib "winhttp" ( _
    ByVal hInternet As LongPtr, _
    ByVal lpfnInternetCallback As LongPtr, _
    ByVal dwNotificationFlags As Long, _
    ByVal dwReserved As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WinHttpSetStatusCallback = ctypes.windll.winhttp.WinHttpSetStatusCallback
WinHttpSetStatusCallback.restype = ctypes.c_void_p
WinHttpSetStatusCallback.argtypes = [
    ctypes.POINTER(None),  # hInternet : void* in/out
    ctypes.c_void_p,  # lpfnInternetCallback : WINHTTP_STATUS_CALLBACK
    wintypes.DWORD,  # dwNotificationFlags : DWORD
    ctypes.c_size_t,  # dwReserved : UINT_PTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINHTTP.dll')
WinHttpSetStatusCallback = Fiddle::Function.new(
  lib['WinHttpSetStatusCallback'],
  [
    Fiddle::TYPE_VOIDP,  # hInternet : void* in/out
    Fiddle::TYPE_VOIDP,  # lpfnInternetCallback : WINHTTP_STATUS_CALLBACK
    -Fiddle::TYPE_INT,  # dwNotificationFlags : DWORD
    Fiddle::TYPE_UINTPTR_T,  # dwReserved : UINT_PTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "winhttp")]
extern "system" {
    fn WinHttpSetStatusCallback(
        hInternet: *mut (),  // void* in/out
        lpfnInternetCallback: *const core::ffi::c_void,  // WINHTTP_STATUS_CALLBACK
        dwNotificationFlags: u32,  // DWORD
        dwReserved: usize  // UINT_PTR
    ) -> *const core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINHTTP.dll", SetLastError = true)]
public static extern IntPtr WinHttpSetStatusCallback(IntPtr hInternet, IntPtr lpfnInternetCallback, uint dwNotificationFlags, UIntPtr dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINHTTP_WinHttpSetStatusCallback' -Namespace Win32 -PassThru
# $api::WinHttpSetStatusCallback(hInternet, lpfnInternetCallback, dwNotificationFlags, dwReserved)

#uselib "WINHTTP.dll"
#func global WinHttpSetStatusCallback "WinHttpSetStatusCallback" sptr, sptr, sptr, sptr
; WinHttpSetStatusCallback hInternet, lpfnInternetCallback, dwNotificationFlags, dwReserved   ; 戻り値は stat
; hInternet : void* in/out -> "sptr"
; lpfnInternetCallback : WINHTTP_STATUS_CALLBACK -> "sptr"
; dwNotificationFlags : DWORD -> "sptr"
; dwReserved : UINT_PTR -> "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 "WINHTTP.dll"
#cfunc global WinHttpSetStatusCallback "WinHttpSetStatusCallback" sptr, sptr, int, sptr
; res = WinHttpSetStatusCallback(hInternet, lpfnInternetCallback, dwNotificationFlags, dwReserved)
; hInternet : void* in/out -> "sptr"
; lpfnInternetCallback : WINHTTP_STATUS_CALLBACK -> "sptr"
; dwNotificationFlags : DWORD -> "int"
; dwReserved : UINT_PTR -> "sptr"

; WINHTTP_STATUS_CALLBACK WinHttpSetStatusCallback(void* hInternet, WINHTTP_STATUS_CALLBACK lpfnInternetCallback, DWORD dwNotificationFlags, UINT_PTR dwReserved)
#uselib "WINHTTP.dll"
#cfunc global WinHttpSetStatusCallback "WinHttpSetStatusCallback" intptr, intptr, int, intptr
; res = WinHttpSetStatusCallback(hInternet, lpfnInternetCallback, dwNotificationFlags, dwReserved)
; hInternet : void* in/out -> "intptr"
; lpfnInternetCallback : WINHTTP_STATUS_CALLBACK -> "intptr"
; dwNotificationFlags : DWORD -> "int"
; dwReserved : UINT_PTR -> "intptr"

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

var (
	winhttp = windows.NewLazySystemDLL("WINHTTP.dll")
	procWinHttpSetStatusCallback = winhttp.NewProc("WinHttpSetStatusCallback")
)

// hInternet (void* in/out), lpfnInternetCallback (WINHTTP_STATUS_CALLBACK), dwNotificationFlags (DWORD), dwReserved (UINT_PTR)
r1, _, err := procWinHttpSetStatusCallback.Call(
	uintptr(hInternet),
	uintptr(lpfnInternetCallback),
	uintptr(dwNotificationFlags),
	uintptr(dwReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WINHTTP_STATUS_CALLBACK

function WinHttpSetStatusCallback(
  hInternet: Pointer;   // void* in/out
  lpfnInternetCallback: Pointer;   // WINHTTP_STATUS_CALLBACK
  dwNotificationFlags: DWORD;   // DWORD
  dwReserved: NativeUInt   // UINT_PTR
): Pointer; stdcall;
  external 'WINHTTP.dll' name 'WinHttpSetStatusCallback';

result := DllCall("WINHTTP\WinHttpSetStatusCallback"
    , "Ptr", hInternet   ; void* in/out
    , "Ptr", lpfnInternetCallback   ; WINHTTP_STATUS_CALLBACK
    , "UInt", dwNotificationFlags   ; DWORD
    , "UPtr", dwReserved   ; UINT_PTR
    , "Ptr")   ; return: WINHTTP_STATUS_CALLBACK

●WinHttpSetStatusCallback(hInternet, lpfnInternetCallback, dwNotificationFlags, dwReserved) = DLL("WINHTTP.dll", "void* WinHttpSetStatusCallback(void*, void*, dword, int)")
# 呼び出し: WinHttpSetStatusCallback(hInternet, lpfnInternetCallback, dwNotificationFlags, dwReserved)
# hInternet : void* in/out -> "void*"
# lpfnInternetCallback : WINHTTP_STATUS_CALLBACK -> "void*"
# dwNotificationFlags : DWORD -> "dword"
# dwReserved : UINT_PTR -> "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)。