NetUserChangePassword

// NETAPI32.dll
#include <windows.h>

DWORD NetUserChangePassword(
    LPCWSTR domainname,   // optional
    LPCWSTR username,   // optional
    LPCWSTR oldpassword,
    LPCWSTR newpassword
);

<DllImport("NETAPI32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function NetUserChangePassword(
    <MarshalAs(UnmanagedType.LPWStr)> domainname As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> username As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> oldpassword As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> newpassword As String   ' LPCWSTR
) As UInteger
End Function

' domainname : LPCWSTR optional
' username : LPCWSTR optional
' oldpassword : LPCWSTR
' newpassword : LPCWSTR
Declare PtrSafe Function NetUserChangePassword Lib "netapi32" ( _
    ByVal domainname As LongPtr, _
    ByVal username As LongPtr, _
    ByVal oldpassword As LongPtr, _
    ByVal newpassword 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

NetUserChangePassword = ctypes.windll.netapi32.NetUserChangePassword
NetUserChangePassword.restype = wintypes.DWORD
NetUserChangePassword.argtypes = [
    wintypes.LPCWSTR,  # domainname : LPCWSTR optional
    wintypes.LPCWSTR,  # username : LPCWSTR optional
    wintypes.LPCWSTR,  # oldpassword : LPCWSTR
    wintypes.LPCWSTR,  # newpassword : LPCWSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETAPI32.dll')
NetUserChangePassword = Fiddle::Function.new(
  lib['NetUserChangePassword'],
  [
    Fiddle::TYPE_VOIDP,  # domainname : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # username : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # oldpassword : LPCWSTR
    Fiddle::TYPE_VOIDP,  # newpassword : LPCWSTR
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netapi32")]
extern "system" {
    fn NetUserChangePassword(
        domainname: *const u16,  // LPCWSTR optional
        username: *const u16,  // LPCWSTR optional
        oldpassword: *const u16,  // LPCWSTR
        newpassword: *const u16  // LPCWSTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETAPI32.dll", SetLastError = true)]
public static extern uint NetUserChangePassword([MarshalAs(UnmanagedType.LPWStr)] string domainname, [MarshalAs(UnmanagedType.LPWStr)] string username, [MarshalAs(UnmanagedType.LPWStr)] string oldpassword, [MarshalAs(UnmanagedType.LPWStr)] string newpassword);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETAPI32_NetUserChangePassword' -Namespace Win32 -PassThru
# $api::NetUserChangePassword(domainname, username, oldpassword, newpassword)

#uselib "NETAPI32.dll"
#func global NetUserChangePassword "NetUserChangePassword" sptr, sptr, sptr, sptr
; NetUserChangePassword domainname, username, oldpassword, newpassword   ; 戻り値は stat
; domainname : LPCWSTR optional -> "sptr"
; username : LPCWSTR optional -> "sptr"
; oldpassword : LPCWSTR -> "sptr"
; newpassword : 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 "NETAPI32.dll"
#cfunc global NetUserChangePassword "NetUserChangePassword" wstr, wstr, wstr, wstr
; res = NetUserChangePassword(domainname, username, oldpassword, newpassword)
; domainname : LPCWSTR optional -> "wstr"
; username : LPCWSTR optional -> "wstr"
; oldpassword : LPCWSTR -> "wstr"
; newpassword : LPCWSTR -> "wstr"

; DWORD NetUserChangePassword(LPCWSTR domainname, LPCWSTR username, LPCWSTR oldpassword, LPCWSTR newpassword)
#uselib "NETAPI32.dll"
#cfunc global NetUserChangePassword "NetUserChangePassword" wstr, wstr, wstr, wstr
; res = NetUserChangePassword(domainname, username, oldpassword, newpassword)
; domainname : LPCWSTR optional -> "wstr"
; username : LPCWSTR optional -> "wstr"
; oldpassword : LPCWSTR -> "wstr"
; newpassword : LPCWSTR -> "wstr"

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

var (
	netapi32 = windows.NewLazySystemDLL("NETAPI32.dll")
	procNetUserChangePassword = netapi32.NewProc("NetUserChangePassword")
)

// domainname (LPCWSTR optional), username (LPCWSTR optional), oldpassword (LPCWSTR), newpassword (LPCWSTR)
r1, _, err := procNetUserChangePassword.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(domainname))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(username))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(oldpassword))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(newpassword))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function NetUserChangePassword(
  domainname: PWideChar;   // LPCWSTR optional
  username: PWideChar;   // LPCWSTR optional
  oldpassword: PWideChar;   // LPCWSTR
  newpassword: PWideChar   // LPCWSTR
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'NetUserChangePassword';

result := DllCall("NETAPI32\NetUserChangePassword"
    , "WStr", domainname   ; LPCWSTR optional
    , "WStr", username   ; LPCWSTR optional
    , "WStr", oldpassword   ; LPCWSTR
    , "WStr", newpassword   ; LPCWSTR
    , "UInt")   ; return: DWORD

●NetUserChangePassword(domainname, username, oldpassword, newpassword) = DLL("NETAPI32.dll", "dword NetUserChangePassword(char*, char*, char*, char*)")
# 呼び出し: NetUserChangePassword(domainname, username, oldpassword, newpassword)
# domainname : LPCWSTR optional -> "char*"
# username : LPCWSTR optional -> "char*"
# oldpassword : LPCWSTR -> "char*"
# newpassword : 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)。