RegisterMediaTypeClass

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

HRESULT RegisterMediaTypeClass(
    IBindCtx* pBC,
    DWORD ctypes,
    LPCSTR* rgszTypes,
    GUID* rgclsID,
    DWORD reserved
);

<DllImport("urlmon.dll", ExactSpelling:=True)>
Public Shared Function RegisterMediaTypeClass(
    pBC As IntPtr,   ' IBindCtx*
    ctypes As UInteger,   ' DWORD
    rgszTypes As IntPtr,   ' LPCSTR*
    ByRef rgclsID As Guid,   ' GUID*
    reserved As UInteger   ' DWORD
) As Integer
End Function

' pBC : IBindCtx*
' ctypes : DWORD
' rgszTypes : LPCSTR*
' rgclsID : GUID*
' reserved : DWORD
Declare PtrSafe Function RegisterMediaTypeClass Lib "urlmon" ( _
    ByVal pBC As LongPtr, _
    ByVal ctypes As Long, _
    ByVal rgszTypes As LongPtr, _
    ByVal rgclsID As LongPtr, _
    ByVal reserved 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

RegisterMediaTypeClass = ctypes.windll.urlmon.RegisterMediaTypeClass
RegisterMediaTypeClass.restype = ctypes.c_int
RegisterMediaTypeClass.argtypes = [
    ctypes.c_void_p,  # pBC : IBindCtx*
    wintypes.DWORD,  # ctypes : DWORD
    ctypes.c_void_p,  # rgszTypes : LPCSTR*
    ctypes.c_void_p,  # rgclsID : GUID*
    wintypes.DWORD,  # reserved : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('urlmon.dll')
RegisterMediaTypeClass = Fiddle::Function.new(
  lib['RegisterMediaTypeClass'],
  [
    Fiddle::TYPE_VOIDP,  # pBC : IBindCtx*
    -Fiddle::TYPE_INT,  # ctypes : DWORD
    Fiddle::TYPE_VOIDP,  # rgszTypes : LPCSTR*
    Fiddle::TYPE_VOIDP,  # rgclsID : GUID*
    -Fiddle::TYPE_INT,  # reserved : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "urlmon")]
extern "system" {
    fn RegisterMediaTypeClass(
        pBC: *mut core::ffi::c_void,  // IBindCtx*
        ctypes: u32,  // DWORD
        rgszTypes: *const *const u8,  // LPCSTR*
        rgclsID: *mut GUID,  // GUID*
        reserved: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("urlmon.dll")]
public static extern int RegisterMediaTypeClass(IntPtr pBC, uint ctypes, IntPtr rgszTypes, ref Guid rgclsID, uint reserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'urlmon_RegisterMediaTypeClass' -Namespace Win32 -PassThru
# $api::RegisterMediaTypeClass(pBC, ctypes, rgszTypes, rgclsID, reserved)

#uselib "urlmon.dll"
#func global RegisterMediaTypeClass "RegisterMediaTypeClass" sptr, sptr, sptr, sptr, sptr
; RegisterMediaTypeClass pBC, ctypes, varptr(rgszTypes), varptr(rgclsID), reserved   ; 戻り値は stat
; pBC : IBindCtx* -> "sptr"
; ctypes : DWORD -> "sptr"
; rgszTypes : LPCSTR* -> "sptr"
; rgclsID : GUID* -> "sptr"
; reserved : 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 RegisterMediaTypeClass "RegisterMediaTypeClass" sptr, int, var, var, int
; res = RegisterMediaTypeClass(pBC, ctypes, rgszTypes, rgclsID, reserved)
; pBC : IBindCtx* -> "sptr"
; ctypes : DWORD -> "int"
; rgszTypes : LPCSTR* -> "var"
; rgclsID : GUID* -> "var"
; reserved : 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 RegisterMediaTypeClass(IBindCtx* pBC, DWORD ctypes, LPCSTR* rgszTypes, GUID* rgclsID, DWORD reserved)
#uselib "urlmon.dll"
#cfunc global RegisterMediaTypeClass "RegisterMediaTypeClass" intptr, int, var, var, int
; res = RegisterMediaTypeClass(pBC, ctypes, rgszTypes, rgclsID, reserved)
; pBC : IBindCtx* -> "intptr"
; ctypes : DWORD -> "int"
; rgszTypes : LPCSTR* -> "var"
; rgclsID : GUID* -> "var"
; reserved : 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")
	procRegisterMediaTypeClass = urlmon.NewProc("RegisterMediaTypeClass")
)

// pBC (IBindCtx*), ctypes (DWORD), rgszTypes (LPCSTR*), rgclsID (GUID*), reserved (DWORD)
r1, _, err := procRegisterMediaTypeClass.Call(
	uintptr(pBC),
	uintptr(ctypes),
	uintptr(rgszTypes),
	uintptr(rgclsID),
	uintptr(reserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function RegisterMediaTypeClass(
  pBC: Pointer;   // IBindCtx*
  ctypes: DWORD;   // DWORD
  rgszTypes: PPAnsiChar;   // LPCSTR*
  rgclsID: PGUID;   // GUID*
  reserved: DWORD   // DWORD
): Integer; stdcall;
  external 'urlmon.dll' name 'RegisterMediaTypeClass';

result := DllCall("urlmon\RegisterMediaTypeClass"
    , "Ptr", pBC   ; IBindCtx*
    , "UInt", ctypes   ; DWORD
    , "Ptr", rgszTypes   ; LPCSTR*
    , "Ptr", rgclsID   ; GUID*
    , "UInt", reserved   ; DWORD
    , "Int")   ; return: HRESULT

●RegisterMediaTypeClass(pBC, ctypes, rgszTypes, rgclsID, reserved) = DLL("urlmon.dll", "int RegisterMediaTypeClass(void*, dword, void*, void*, dword)")
# 呼び出し: RegisterMediaTypeClass(pBC, ctypes, rgszTypes, rgclsID, reserved)
# pBC : IBindCtx* -> "void*"
# ctypes : DWORD -> "dword"
# rgszTypes : LPCSTR* -> "void*"
# rgclsID : GUID* -> "void*"
# reserved : 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)。