CoInternetCombineIUri

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

HRESULT CoInternetCombineIUri(
    IUri* pBaseUri,
    IUri* pRelativeUri,
    DWORD dwCombineFlags,
    IUri** ppCombinedUri,
    UINT_PTR dwReserved   // optional
);

<DllImport("urlmon.dll", ExactSpelling:=True)>
Public Shared Function CoInternetCombineIUri(
    pBaseUri As IntPtr,   ' IUri*
    pRelativeUri As IntPtr,   ' IUri*
    dwCombineFlags As UInteger,   ' DWORD
    ppCombinedUri As IntPtr,   ' IUri** out
    dwReserved As UIntPtr   ' UINT_PTR optional
) As Integer
End Function

' pBaseUri : IUri*
' pRelativeUri : IUri*
' dwCombineFlags : DWORD
' ppCombinedUri : IUri** out
' dwReserved : UINT_PTR optional
Declare PtrSafe Function CoInternetCombineIUri Lib "urlmon" ( _
    ByVal pBaseUri As LongPtr, _
    ByVal pRelativeUri As LongPtr, _
    ByVal dwCombineFlags As Long, _
    ByVal ppCombinedUri As LongPtr, _
    ByVal dwReserved 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

CoInternetCombineIUri = ctypes.windll.urlmon.CoInternetCombineIUri
CoInternetCombineIUri.restype = ctypes.c_int
CoInternetCombineIUri.argtypes = [
    ctypes.c_void_p,  # pBaseUri : IUri*
    ctypes.c_void_p,  # pRelativeUri : IUri*
    wintypes.DWORD,  # dwCombineFlags : DWORD
    ctypes.c_void_p,  # ppCombinedUri : IUri** out
    ctypes.c_size_t,  # dwReserved : UINT_PTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('urlmon.dll')
CoInternetCombineIUri = Fiddle::Function.new(
  lib['CoInternetCombineIUri'],
  [
    Fiddle::TYPE_VOIDP,  # pBaseUri : IUri*
    Fiddle::TYPE_VOIDP,  # pRelativeUri : IUri*
    -Fiddle::TYPE_INT,  # dwCombineFlags : DWORD
    Fiddle::TYPE_VOIDP,  # ppCombinedUri : IUri** out
    Fiddle::TYPE_UINTPTR_T,  # dwReserved : UINT_PTR optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "urlmon")]
extern "system" {
    fn CoInternetCombineIUri(
        pBaseUri: *mut core::ffi::c_void,  // IUri*
        pRelativeUri: *mut core::ffi::c_void,  // IUri*
        dwCombineFlags: u32,  // DWORD
        ppCombinedUri: *mut *mut core::ffi::c_void,  // IUri** out
        dwReserved: usize  // UINT_PTR optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("urlmon.dll")]
public static extern int CoInternetCombineIUri(IntPtr pBaseUri, IntPtr pRelativeUri, uint dwCombineFlags, IntPtr ppCombinedUri, UIntPtr dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'urlmon_CoInternetCombineIUri' -Namespace Win32 -PassThru
# $api::CoInternetCombineIUri(pBaseUri, pRelativeUri, dwCombineFlags, ppCombinedUri, dwReserved)

#uselib "urlmon.dll"
#func global CoInternetCombineIUri "CoInternetCombineIUri" sptr, sptr, sptr, sptr, sptr
; CoInternetCombineIUri pBaseUri, pRelativeUri, dwCombineFlags, ppCombinedUri, dwReserved   ; 戻り値は stat
; pBaseUri : IUri* -> "sptr"
; pRelativeUri : IUri* -> "sptr"
; dwCombineFlags : DWORD -> "sptr"
; ppCombinedUri : IUri** out -> "sptr"
; dwReserved : UINT_PTR optional -> "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 CoInternetCombineIUri "CoInternetCombineIUri" sptr, sptr, int, sptr, sptr
; res = CoInternetCombineIUri(pBaseUri, pRelativeUri, dwCombineFlags, ppCombinedUri, dwReserved)
; pBaseUri : IUri* -> "sptr"
; pRelativeUri : IUri* -> "sptr"
; dwCombineFlags : DWORD -> "int"
; ppCombinedUri : IUri** out -> "sptr"
; dwReserved : UINT_PTR optional -> "sptr"

; HRESULT CoInternetCombineIUri(IUri* pBaseUri, IUri* pRelativeUri, DWORD dwCombineFlags, IUri** ppCombinedUri, UINT_PTR dwReserved)
#uselib "urlmon.dll"
#cfunc global CoInternetCombineIUri "CoInternetCombineIUri" intptr, intptr, int, intptr, intptr
; res = CoInternetCombineIUri(pBaseUri, pRelativeUri, dwCombineFlags, ppCombinedUri, dwReserved)
; pBaseUri : IUri* -> "intptr"
; pRelativeUri : IUri* -> "intptr"
; dwCombineFlags : DWORD -> "int"
; ppCombinedUri : IUri** out -> "intptr"
; dwReserved : UINT_PTR optional -> "intptr"

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

var (
	urlmon = windows.NewLazySystemDLL("urlmon.dll")
	procCoInternetCombineIUri = urlmon.NewProc("CoInternetCombineIUri")
)

// pBaseUri (IUri*), pRelativeUri (IUri*), dwCombineFlags (DWORD), ppCombinedUri (IUri** out), dwReserved (UINT_PTR optional)
r1, _, err := procCoInternetCombineIUri.Call(
	uintptr(pBaseUri),
	uintptr(pRelativeUri),
	uintptr(dwCombineFlags),
	uintptr(ppCombinedUri),
	uintptr(dwReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoInternetCombineIUri(
  pBaseUri: Pointer;   // IUri*
  pRelativeUri: Pointer;   // IUri*
  dwCombineFlags: DWORD;   // DWORD
  ppCombinedUri: Pointer;   // IUri** out
  dwReserved: NativeUInt   // UINT_PTR optional
): Integer; stdcall;
  external 'urlmon.dll' name 'CoInternetCombineIUri';

result := DllCall("urlmon\CoInternetCombineIUri"
    , "Ptr", pBaseUri   ; IUri*
    , "Ptr", pRelativeUri   ; IUri*
    , "UInt", dwCombineFlags   ; DWORD
    , "Ptr", ppCombinedUri   ; IUri** out
    , "UPtr", dwReserved   ; UINT_PTR optional
    , "Int")   ; return: HRESULT

●CoInternetCombineIUri(pBaseUri, pRelativeUri, dwCombineFlags, ppCombinedUri, dwReserved) = DLL("urlmon.dll", "int CoInternetCombineIUri(void*, void*, dword, void*, int)")
# 呼び出し: CoInternetCombineIUri(pBaseUri, pRelativeUri, dwCombineFlags, ppCombinedUri, dwReserved)
# pBaseUri : IUri* -> "void*"
# pRelativeUri : IUri* -> "void*"
# dwCombineFlags : DWORD -> "dword"
# ppCombinedUri : IUri** out -> "void*"
# dwReserved : UINT_PTR optional -> "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)。