ClusterRegDeleteKey

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

INT ClusterRegDeleteKey(
    HKEY hKey,
    LPCWSTR lpszSubKey
);

<DllImport("CLUSAPI.dll", ExactSpelling:=True)>
Public Shared Function ClusterRegDeleteKey(
    hKey As IntPtr,   ' HKEY
    <MarshalAs(UnmanagedType.LPWStr)> lpszSubKey As String   ' LPCWSTR
) As Integer
End Function

' hKey : HKEY
' lpszSubKey : LPCWSTR
Declare PtrSafe Function ClusterRegDeleteKey Lib "clusapi" ( _
    ByVal hKey As LongPtr, _
    ByVal lpszSubKey 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

ClusterRegDeleteKey = ctypes.windll.clusapi.ClusterRegDeleteKey
ClusterRegDeleteKey.restype = ctypes.c_int
ClusterRegDeleteKey.argtypes = [
    wintypes.HANDLE,  # hKey : HKEY
    wintypes.LPCWSTR,  # lpszSubKey : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CLUSAPI.dll')
ClusterRegDeleteKey = Fiddle::Function.new(
  lib['ClusterRegDeleteKey'],
  [
    Fiddle::TYPE_VOIDP,  # hKey : HKEY
    Fiddle::TYPE_VOIDP,  # lpszSubKey : LPCWSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "clusapi")]
extern "system" {
    fn ClusterRegDeleteKey(
        hKey: *mut core::ffi::c_void,  // HKEY
        lpszSubKey: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CLUSAPI.dll")]
public static extern int ClusterRegDeleteKey(IntPtr hKey, [MarshalAs(UnmanagedType.LPWStr)] string lpszSubKey);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CLUSAPI_ClusterRegDeleteKey' -Namespace Win32 -PassThru
# $api::ClusterRegDeleteKey(hKey, lpszSubKey)

#uselib "CLUSAPI.dll"
#func global ClusterRegDeleteKey "ClusterRegDeleteKey" sptr, sptr
; ClusterRegDeleteKey hKey, lpszSubKey   ; 戻り値は stat
; hKey : HKEY -> "sptr"
; lpszSubKey : LPCWSTR -> "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 "CLUSAPI.dll"
#cfunc global ClusterRegDeleteKey "ClusterRegDeleteKey" sptr, wstr
; res = ClusterRegDeleteKey(hKey, lpszSubKey)
; hKey : HKEY -> "sptr"
; lpszSubKey : LPCWSTR -> "wstr"

; INT ClusterRegDeleteKey(HKEY hKey, LPCWSTR lpszSubKey)
#uselib "CLUSAPI.dll"
#cfunc global ClusterRegDeleteKey "ClusterRegDeleteKey" intptr, wstr
; res = ClusterRegDeleteKey(hKey, lpszSubKey)
; hKey : HKEY -> "intptr"
; lpszSubKey : LPCWSTR -> "wstr"

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

var (
	clusapi = windows.NewLazySystemDLL("CLUSAPI.dll")
	procClusterRegDeleteKey = clusapi.NewProc("ClusterRegDeleteKey")
)

// hKey (HKEY), lpszSubKey (LPCWSTR)
r1, _, err := procClusterRegDeleteKey.Call(
	uintptr(hKey),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszSubKey))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ClusterRegDeleteKey(
  hKey: THandle;   // HKEY
  lpszSubKey: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'CLUSAPI.dll' name 'ClusterRegDeleteKey';

result := DllCall("CLUSAPI\ClusterRegDeleteKey"
    , "Ptr", hKey   ; HKEY
    , "WStr", lpszSubKey   ; LPCWSTR
    , "Int")   ; return: INT

●ClusterRegDeleteKey(hKey, lpszSubKey) = DLL("CLUSAPI.dll", "int ClusterRegDeleteKey(void*, char*)")
# 呼び出し: ClusterRegDeleteKey(hKey, lpszSubKey)
# hKey : HKEY -> "void*"
# lpszSubKey : LPCWSTR -> "char*"
# 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)。