RegInstallW

// ADVPACK.dll  (Unicode / -W)
#include <windows.h>

HRESULT RegInstallW(
    HMODULE hmod,
    LPCWSTR pszSection,
    const STRTABLEW* pstTable
);

<DllImport("ADVPACK.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function RegInstallW(
    hmod As IntPtr,   ' HMODULE
    <MarshalAs(UnmanagedType.LPWStr)> pszSection As String,   ' LPCWSTR
    pstTable As IntPtr   ' STRTABLEW*
) As Integer
End Function

' hmod : HMODULE
' pszSection : LPCWSTR
' pstTable : STRTABLEW*
Declare PtrSafe Function RegInstallW Lib "advpack" ( _
    ByVal hmod As LongPtr, _
    ByVal pszSection As LongPtr, _
    ByVal pstTable As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RegInstallW = ctypes.windll.advpack.RegInstallW
RegInstallW.restype = ctypes.c_int
RegInstallW.argtypes = [
    wintypes.HANDLE,  # hmod : HMODULE
    wintypes.LPCWSTR,  # pszSection : LPCWSTR
    ctypes.c_void_p,  # pstTable : STRTABLEW*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVPACK.dll')
RegInstallW = Fiddle::Function.new(
  lib['RegInstallW'],
  [
    Fiddle::TYPE_VOIDP,  # hmod : HMODULE
    Fiddle::TYPE_VOIDP,  # pszSection : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pstTable : STRTABLEW*
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advpack")]
extern "system" {
    fn RegInstallW(
        hmod: *mut core::ffi::c_void,  // HMODULE
        pszSection: *const u16,  // LPCWSTR
        pstTable: *const STRTABLEW  // STRTABLEW*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVPACK.dll", CharSet = CharSet.Unicode)]
public static extern int RegInstallW(IntPtr hmod, [MarshalAs(UnmanagedType.LPWStr)] string pszSection, IntPtr pstTable);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVPACK_RegInstallW' -Namespace Win32 -PassThru
# $api::RegInstallW(hmod, pszSection, pstTable)

#uselib "ADVPACK.dll"
#func global RegInstallW "RegInstallW" wptr, wptr, wptr
; RegInstallW hmod, pszSection, varptr(pstTable)   ; 戻り値は stat
; hmod : HMODULE -> "wptr"
; pszSection : LPCWSTR -> "wptr"
; pstTable : STRTABLEW* -> "wptr"
; ※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 "ADVPACK.dll"
#cfunc global RegInstallW "RegInstallW" sptr, wstr, var
; res = RegInstallW(hmod, pszSection, pstTable)
; hmod : HMODULE -> "sptr"
; pszSection : LPCWSTR -> "wstr"
; pstTable : STRTABLEW* -> "var"
; ※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 RegInstallW(HMODULE hmod, LPCWSTR pszSection, STRTABLEW* pstTable)
#uselib "ADVPACK.dll"
#cfunc global RegInstallW "RegInstallW" intptr, wstr, var
; res = RegInstallW(hmod, pszSection, pstTable)
; hmod : HMODULE -> "intptr"
; pszSection : LPCWSTR -> "wstr"
; pstTable : STRTABLEW* -> "var"
; ※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 (
	advpack = windows.NewLazySystemDLL("ADVPACK.dll")
	procRegInstallW = advpack.NewProc("RegInstallW")
)

// hmod (HMODULE), pszSection (LPCWSTR), pstTable (STRTABLEW*)
r1, _, err := procRegInstallW.Call(
	uintptr(hmod),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszSection))),
	uintptr(pstTable),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function RegInstallW(
  hmod: THandle;   // HMODULE
  pszSection: PWideChar;   // LPCWSTR
  pstTable: Pointer   // STRTABLEW*
): Integer; stdcall;
  external 'ADVPACK.dll' name 'RegInstallW';

result := DllCall("ADVPACK\RegInstallW"
    , "Ptr", hmod   ; HMODULE
    , "WStr", pszSection   ; LPCWSTR
    , "Ptr", pstTable   ; STRTABLEW*
    , "Int")   ; return: HRESULT

●RegInstallW(hmod, pszSection, pstTable) = DLL("ADVPACK.dll", "int RegInstallW(void*, char*, void*)")
# 呼び出し: RegInstallW(hmod, pszSection, pstTable)
# hmod : HMODULE -> "void*"
# pszSection : LPCWSTR -> "char*"
# pstTable : STRTABLEW* -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。