SHRegSetUSValueW

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

WIN32_ERROR SHRegSetUSValueW(
    LPCWSTR pwzSubKey,
    LPCWSTR pwzValue,
    DWORD dwType,
    const void* pvData,   // optional
    DWORD cbData,   // optional
    DWORD dwFlags   // optional
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHRegSetUSValueW(
    <MarshalAs(UnmanagedType.LPWStr)> pwzSubKey As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pwzValue As String,   ' LPCWSTR
    dwType As UInteger,   ' DWORD
    pvData As IntPtr,   ' void* optional
    cbData As UInteger,   ' DWORD optional
    dwFlags As UInteger   ' DWORD optional
) As UInteger
End Function

' pwzSubKey : LPCWSTR
' pwzValue : LPCWSTR
' dwType : DWORD
' pvData : void* optional
' cbData : DWORD optional
' dwFlags : DWORD optional
Declare PtrSafe Function SHRegSetUSValueW Lib "shlwapi" ( _
    ByVal pwzSubKey As LongPtr, _
    ByVal pwzValue As LongPtr, _
    ByVal dwType As Long, _
    ByVal pvData As LongPtr, _
    ByVal cbData As Long, _
    ByVal dwFlags As Long) 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

SHRegSetUSValueW = ctypes.windll.shlwapi.SHRegSetUSValueW
SHRegSetUSValueW.restype = wintypes.DWORD
SHRegSetUSValueW.argtypes = [
    wintypes.LPCWSTR,  # pwzSubKey : LPCWSTR
    wintypes.LPCWSTR,  # pwzValue : LPCWSTR
    wintypes.DWORD,  # dwType : DWORD
    ctypes.POINTER(None),  # pvData : void* optional
    wintypes.DWORD,  # cbData : DWORD optional
    wintypes.DWORD,  # dwFlags : DWORD optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHRegSetUSValueW = Fiddle::Function.new(
  lib['SHRegSetUSValueW'],
  [
    Fiddle::TYPE_VOIDP,  # pwzSubKey : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pwzValue : LPCWSTR
    -Fiddle::TYPE_INT,  # dwType : DWORD
    Fiddle::TYPE_VOIDP,  # pvData : void* optional
    -Fiddle::TYPE_INT,  # cbData : DWORD optional
    -Fiddle::TYPE_INT,  # dwFlags : DWORD optional
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn SHRegSetUSValueW(
        pwzSubKey: *const u16,  // LPCWSTR
        pwzValue: *const u16,  // LPCWSTR
        dwType: u32,  // DWORD
        pvData: *const (),  // void* optional
        cbData: u32,  // DWORD optional
        dwFlags: u32  // DWORD optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern uint SHRegSetUSValueW([MarshalAs(UnmanagedType.LPWStr)] string pwzSubKey, [MarshalAs(UnmanagedType.LPWStr)] string pwzValue, uint dwType, IntPtr pvData, uint cbData, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHRegSetUSValueW' -Namespace Win32 -PassThru
# $api::SHRegSetUSValueW(pwzSubKey, pwzValue, dwType, pvData, cbData, dwFlags)

#uselib "SHLWAPI.dll"
#func global SHRegSetUSValueW "SHRegSetUSValueW" wptr, wptr, wptr, wptr, wptr, wptr
; SHRegSetUSValueW pwzSubKey, pwzValue, dwType, pvData, cbData, dwFlags   ; 戻り値は stat
; pwzSubKey : LPCWSTR -> "wptr"
; pwzValue : LPCWSTR -> "wptr"
; dwType : DWORD -> "wptr"
; pvData : void* optional -> "wptr"
; cbData : DWORD optional -> "wptr"
; dwFlags : DWORD optional -> "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 "SHLWAPI.dll"
#cfunc global SHRegSetUSValueW "SHRegSetUSValueW" wstr, wstr, int, sptr, int, int
; res = SHRegSetUSValueW(pwzSubKey, pwzValue, dwType, pvData, cbData, dwFlags)
; pwzSubKey : LPCWSTR -> "wstr"
; pwzValue : LPCWSTR -> "wstr"
; dwType : DWORD -> "int"
; pvData : void* optional -> "sptr"
; cbData : DWORD optional -> "int"
; dwFlags : DWORD optional -> "int"

; WIN32_ERROR SHRegSetUSValueW(LPCWSTR pwzSubKey, LPCWSTR pwzValue, DWORD dwType, void* pvData, DWORD cbData, DWORD dwFlags)
#uselib "SHLWAPI.dll"
#cfunc global SHRegSetUSValueW "SHRegSetUSValueW" wstr, wstr, int, intptr, int, int
; res = SHRegSetUSValueW(pwzSubKey, pwzValue, dwType, pvData, cbData, dwFlags)
; pwzSubKey : LPCWSTR -> "wstr"
; pwzValue : LPCWSTR -> "wstr"
; dwType : DWORD -> "int"
; pvData : void* optional -> "intptr"
; cbData : DWORD optional -> "int"
; dwFlags : DWORD optional -> "int"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHRegSetUSValueW = shlwapi.NewProc("SHRegSetUSValueW")
)

// pwzSubKey (LPCWSTR), pwzValue (LPCWSTR), dwType (DWORD), pvData (void* optional), cbData (DWORD optional), dwFlags (DWORD optional)
r1, _, err := procSHRegSetUSValueW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwzSubKey))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwzValue))),
	uintptr(dwType),
	uintptr(pvData),
	uintptr(cbData),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function SHRegSetUSValueW(
  pwzSubKey: PWideChar;   // LPCWSTR
  pwzValue: PWideChar;   // LPCWSTR
  dwType: DWORD;   // DWORD
  pvData: Pointer;   // void* optional
  cbData: DWORD;   // DWORD optional
  dwFlags: DWORD   // DWORD optional
): DWORD; stdcall;
  external 'SHLWAPI.dll' name 'SHRegSetUSValueW';

result := DllCall("SHLWAPI\SHRegSetUSValueW"
    , "WStr", pwzSubKey   ; LPCWSTR
    , "WStr", pwzValue   ; LPCWSTR
    , "UInt", dwType   ; DWORD
    , "Ptr", pvData   ; void* optional
    , "UInt", cbData   ; DWORD optional
    , "UInt", dwFlags   ; DWORD optional
    , "UInt")   ; return: WIN32_ERROR

●SHRegSetUSValueW(pwzSubKey, pwzValue, dwType, pvData, cbData, dwFlags) = DLL("SHLWAPI.dll", "dword SHRegSetUSValueW(char*, char*, dword, void*, dword, dword)")
# 呼び出し: SHRegSetUSValueW(pwzSubKey, pwzValue, dwType, pvData, cbData, dwFlags)
# pwzSubKey : LPCWSTR -> "char*"
# pwzValue : LPCWSTR -> "char*"
# dwType : DWORD -> "dword"
# pvData : void* optional -> "void*"
# cbData : DWORD optional -> "dword"
# dwFlags : DWORD optional -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。