SHRegWriteUSValueW

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

WIN32_ERROR SHRegWriteUSValueW(
    INT_PTR hUSKey,
    LPCWSTR pwzValue,
    DWORD dwType,
    const void* pvData,
    DWORD cbData,
    DWORD dwFlags
);

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

' hUSKey : INT_PTR
' pwzValue : LPCWSTR
' dwType : DWORD
' pvData : void*
' cbData : DWORD
' dwFlags : DWORD
Declare PtrSafe Function SHRegWriteUSValueW Lib "shlwapi" ( _
    ByVal hUSKey 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

SHRegWriteUSValueW = ctypes.windll.shlwapi.SHRegWriteUSValueW
SHRegWriteUSValueW.restype = wintypes.DWORD
SHRegWriteUSValueW.argtypes = [
    ctypes.c_ssize_t,  # hUSKey : INT_PTR
    wintypes.LPCWSTR,  # pwzValue : LPCWSTR
    wintypes.DWORD,  # dwType : DWORD
    ctypes.POINTER(None),  # pvData : void*
    wintypes.DWORD,  # cbData : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

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

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

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

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

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

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHRegWriteUSValueW = shlwapi.NewProc("SHRegWriteUSValueW")
)

// hUSKey (INT_PTR), pwzValue (LPCWSTR), dwType (DWORD), pvData (void*), cbData (DWORD), dwFlags (DWORD)
r1, _, err := procSHRegWriteUSValueW.Call(
	uintptr(hUSKey),
	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 SHRegWriteUSValueW(
  hUSKey: NativeInt;   // INT_PTR
  pwzValue: PWideChar;   // LPCWSTR
  dwType: DWORD;   // DWORD
  pvData: Pointer;   // void*
  cbData: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): DWORD; stdcall;
  external 'SHLWAPI.dll' name 'SHRegWriteUSValueW';

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

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