RegOpenUserClassesRoot

// ADVAPI32.dll
#include <windows.h>

WIN32_ERROR RegOpenUserClassesRoot(
    HANDLE hToken,
    DWORD dwOptions,   // optional
    DWORD samDesired,
    HKEY* phkResult
);

<DllImport("ADVAPI32.dll", ExactSpelling:=True)>
Public Shared Function RegOpenUserClassesRoot(
    hToken As IntPtr,   ' HANDLE
    dwOptions As UInteger,   ' DWORD optional
    samDesired As UInteger,   ' DWORD
    phkResult As IntPtr   ' HKEY* out
) As UInteger
End Function

' hToken : HANDLE
' dwOptions : DWORD optional
' samDesired : DWORD
' phkResult : HKEY* out
Declare PtrSafe Function RegOpenUserClassesRoot Lib "advapi32" ( _
    ByVal hToken As LongPtr, _
    ByVal dwOptions As Long, _
    ByVal samDesired As Long, _
    ByVal phkResult 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

RegOpenUserClassesRoot = ctypes.windll.advapi32.RegOpenUserClassesRoot
RegOpenUserClassesRoot.restype = wintypes.DWORD
RegOpenUserClassesRoot.argtypes = [
    wintypes.HANDLE,  # hToken : HANDLE
    wintypes.DWORD,  # dwOptions : DWORD optional
    wintypes.DWORD,  # samDesired : DWORD
    ctypes.c_void_p,  # phkResult : HKEY* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
RegOpenUserClassesRoot = Fiddle::Function.new(
  lib['RegOpenUserClassesRoot'],
  [
    Fiddle::TYPE_VOIDP,  # hToken : HANDLE
    -Fiddle::TYPE_INT,  # dwOptions : DWORD optional
    -Fiddle::TYPE_INT,  # samDesired : DWORD
    Fiddle::TYPE_VOIDP,  # phkResult : HKEY* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn RegOpenUserClassesRoot(
        hToken: *mut core::ffi::c_void,  // HANDLE
        dwOptions: u32,  // DWORD optional
        samDesired: u32,  // DWORD
        phkResult: *mut *mut core::ffi::c_void  // HKEY* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll")]
public static extern uint RegOpenUserClassesRoot(IntPtr hToken, uint dwOptions, uint samDesired, IntPtr phkResult);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_RegOpenUserClassesRoot' -Namespace Win32 -PassThru
# $api::RegOpenUserClassesRoot(hToken, dwOptions, samDesired, phkResult)

#uselib "ADVAPI32.dll"
#func global RegOpenUserClassesRoot "RegOpenUserClassesRoot" sptr, sptr, sptr, sptr
; RegOpenUserClassesRoot hToken, dwOptions, samDesired, phkResult   ; 戻り値は stat
; hToken : HANDLE -> "sptr"
; dwOptions : DWORD optional -> "sptr"
; samDesired : DWORD -> "sptr"
; phkResult : HKEY* out -> "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 "ADVAPI32.dll"
#cfunc global RegOpenUserClassesRoot "RegOpenUserClassesRoot" sptr, int, int, sptr
; res = RegOpenUserClassesRoot(hToken, dwOptions, samDesired, phkResult)
; hToken : HANDLE -> "sptr"
; dwOptions : DWORD optional -> "int"
; samDesired : DWORD -> "int"
; phkResult : HKEY* out -> "sptr"

; WIN32_ERROR RegOpenUserClassesRoot(HANDLE hToken, DWORD dwOptions, DWORD samDesired, HKEY* phkResult)
#uselib "ADVAPI32.dll"
#cfunc global RegOpenUserClassesRoot "RegOpenUserClassesRoot" intptr, int, int, intptr
; res = RegOpenUserClassesRoot(hToken, dwOptions, samDesired, phkResult)
; hToken : HANDLE -> "intptr"
; dwOptions : DWORD optional -> "int"
; samDesired : DWORD -> "int"
; phkResult : HKEY* out -> "intptr"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procRegOpenUserClassesRoot = advapi32.NewProc("RegOpenUserClassesRoot")
)

// hToken (HANDLE), dwOptions (DWORD optional), samDesired (DWORD), phkResult (HKEY* out)
r1, _, err := procRegOpenUserClassesRoot.Call(
	uintptr(hToken),
	uintptr(dwOptions),
	uintptr(samDesired),
	uintptr(phkResult),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function RegOpenUserClassesRoot(
  hToken: THandle;   // HANDLE
  dwOptions: DWORD;   // DWORD optional
  samDesired: DWORD;   // DWORD
  phkResult: Pointer   // HKEY* out
): DWORD; stdcall;
  external 'ADVAPI32.dll' name 'RegOpenUserClassesRoot';

result := DllCall("ADVAPI32\RegOpenUserClassesRoot"
    , "Ptr", hToken   ; HANDLE
    , "UInt", dwOptions   ; DWORD optional
    , "UInt", samDesired   ; DWORD
    , "Ptr", phkResult   ; HKEY* out
    , "UInt")   ; return: WIN32_ERROR

●RegOpenUserClassesRoot(hToken, dwOptions, samDesired, phkResult) = DLL("ADVAPI32.dll", "dword RegOpenUserClassesRoot(void*, dword, dword, void*)")
# 呼び出し: RegOpenUserClassesRoot(hToken, dwOptions, samDesired, phkResult)
# hToken : HANDLE -> "void*"
# dwOptions : DWORD optional -> "dword"
# samDesired : DWORD -> "dword"
# phkResult : HKEY* out -> "void*"
# 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)。