CoInternetGetProtocolFlags

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

HRESULT CoInternetGetProtocolFlags(
    LPCWSTR pwzUrl,
    DWORD* pdwFlags,
    DWORD dwReserved
);

<DllImport("urlmon.dll", ExactSpelling:=True)>
Public Shared Function CoInternetGetProtocolFlags(
    <MarshalAs(UnmanagedType.LPWStr)> pwzUrl As String,   ' LPCWSTR
    <Out> ByRef pdwFlags As UInteger,   ' DWORD* out
    dwReserved As UInteger   ' DWORD
) As Integer
End Function

' pwzUrl : LPCWSTR
' pdwFlags : DWORD* out
' dwReserved : DWORD
Declare PtrSafe Function CoInternetGetProtocolFlags Lib "urlmon" ( _
    ByVal pwzUrl As LongPtr, _
    ByRef pdwFlags As Long, _
    ByVal dwReserved As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CoInternetGetProtocolFlags = ctypes.windll.urlmon.CoInternetGetProtocolFlags
CoInternetGetProtocolFlags.restype = ctypes.c_int
CoInternetGetProtocolFlags.argtypes = [
    wintypes.LPCWSTR,  # pwzUrl : LPCWSTR
    ctypes.POINTER(wintypes.DWORD),  # pdwFlags : DWORD* out
    wintypes.DWORD,  # dwReserved : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('urlmon.dll')
CoInternetGetProtocolFlags = Fiddle::Function.new(
  lib['CoInternetGetProtocolFlags'],
  [
    Fiddle::TYPE_VOIDP,  # pwzUrl : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pdwFlags : DWORD* out
    -Fiddle::TYPE_INT,  # dwReserved : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "urlmon")]
extern "system" {
    fn CoInternetGetProtocolFlags(
        pwzUrl: *const u16,  // LPCWSTR
        pdwFlags: *mut u32,  // DWORD* out
        dwReserved: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("urlmon.dll")]
public static extern int CoInternetGetProtocolFlags([MarshalAs(UnmanagedType.LPWStr)] string pwzUrl, out uint pdwFlags, uint dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'urlmon_CoInternetGetProtocolFlags' -Namespace Win32 -PassThru
# $api::CoInternetGetProtocolFlags(pwzUrl, pdwFlags, dwReserved)

#uselib "urlmon.dll"
#func global CoInternetGetProtocolFlags "CoInternetGetProtocolFlags" sptr, sptr, sptr
; CoInternetGetProtocolFlags pwzUrl, varptr(pdwFlags), dwReserved   ; 戻り値は stat
; pwzUrl : LPCWSTR -> "sptr"
; pdwFlags : DWORD* out -> "sptr"
; dwReserved : DWORD -> "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 "urlmon.dll"
#cfunc global CoInternetGetProtocolFlags "CoInternetGetProtocolFlags" wstr, var, int
; res = CoInternetGetProtocolFlags(pwzUrl, pdwFlags, dwReserved)
; pwzUrl : LPCWSTR -> "wstr"
; pdwFlags : DWORD* out -> "var"
; dwReserved : DWORD -> "int"
; ※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。

; HRESULT CoInternetGetProtocolFlags(LPCWSTR pwzUrl, DWORD* pdwFlags, DWORD dwReserved)
#uselib "urlmon.dll"
#cfunc global CoInternetGetProtocolFlags "CoInternetGetProtocolFlags" wstr, var, int
; res = CoInternetGetProtocolFlags(pwzUrl, pdwFlags, dwReserved)
; pwzUrl : LPCWSTR -> "wstr"
; pdwFlags : DWORD* out -> "var"
; dwReserved : DWORD -> "int"
; ※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 (
	urlmon = windows.NewLazySystemDLL("urlmon.dll")
	procCoInternetGetProtocolFlags = urlmon.NewProc("CoInternetGetProtocolFlags")
)

// pwzUrl (LPCWSTR), pdwFlags (DWORD* out), dwReserved (DWORD)
r1, _, err := procCoInternetGetProtocolFlags.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwzUrl))),
	uintptr(pdwFlags),
	uintptr(dwReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoInternetGetProtocolFlags(
  pwzUrl: PWideChar;   // LPCWSTR
  pdwFlags: Pointer;   // DWORD* out
  dwReserved: DWORD   // DWORD
): Integer; stdcall;
  external 'urlmon.dll' name 'CoInternetGetProtocolFlags';

result := DllCall("urlmon\CoInternetGetProtocolFlags"
    , "WStr", pwzUrl   ; LPCWSTR
    , "Ptr", pdwFlags   ; DWORD* out
    , "UInt", dwReserved   ; DWORD
    , "Int")   ; return: HRESULT

●CoInternetGetProtocolFlags(pwzUrl, pdwFlags, dwReserved) = DLL("urlmon.dll", "int CoInternetGetProtocolFlags(char*, void*, dword)")
# 呼び出し: CoInternetGetProtocolFlags(pwzUrl, pdwFlags, dwReserved)
# pwzUrl : LPCWSTR -> "char*"
# pdwFlags : DWORD* out -> "void*"
# dwReserved : DWORD -> "dword"
# 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)。