DhcpServerBackupDatabase

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

DWORD DhcpServerBackupDatabase(
    LPWSTR ServerIpAddress,   // optional
    LPWSTR Path
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpServerBackupDatabase(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> Path As String   ' LPWSTR
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' Path : LPWSTR
Declare PtrSafe Function DhcpServerBackupDatabase Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal Path 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

DhcpServerBackupDatabase = ctypes.windll.dhcpsapi.DhcpServerBackupDatabase
DhcpServerBackupDatabase.restype = wintypes.DWORD
DhcpServerBackupDatabase.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    wintypes.LPCWSTR,  # Path : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpServerBackupDatabase = Fiddle::Function.new(
  lib['DhcpServerBackupDatabase'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # Path : LPWSTR
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpServerBackupDatabase(
        ServerIpAddress: *mut u16,  // LPWSTR optional
        Path: *mut u16  // LPWSTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpServerBackupDatabase([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, [MarshalAs(UnmanagedType.LPWStr)] string Path);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpServerBackupDatabase' -Namespace Win32 -PassThru
# $api::DhcpServerBackupDatabase(ServerIpAddress, Path)

#uselib "DHCPSAPI.dll"
#func global DhcpServerBackupDatabase "DhcpServerBackupDatabase" sptr, sptr
; DhcpServerBackupDatabase ServerIpAddress, Path   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; Path : LPWSTR -> "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 "DHCPSAPI.dll"
#cfunc global DhcpServerBackupDatabase "DhcpServerBackupDatabase" wstr, wstr
; res = DhcpServerBackupDatabase(ServerIpAddress, Path)
; ServerIpAddress : LPWSTR optional -> "wstr"
; Path : LPWSTR -> "wstr"

; DWORD DhcpServerBackupDatabase(LPWSTR ServerIpAddress, LPWSTR Path)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpServerBackupDatabase "DhcpServerBackupDatabase" wstr, wstr
; res = DhcpServerBackupDatabase(ServerIpAddress, Path)
; ServerIpAddress : LPWSTR optional -> "wstr"
; Path : LPWSTR -> "wstr"

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

var (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpServerBackupDatabase = dhcpsapi.NewProc("DhcpServerBackupDatabase")
)

// ServerIpAddress (LPWSTR optional), Path (LPWSTR)
r1, _, err := procDhcpServerBackupDatabase.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Path))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpServerBackupDatabase(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  Path: PWideChar   // LPWSTR
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpServerBackupDatabase';

result := DllCall("DHCPSAPI\DhcpServerBackupDatabase"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "WStr", Path   ; LPWSTR
    , "UInt")   ; return: DWORD

●DhcpServerBackupDatabase(ServerIpAddress, Path) = DLL("DHCPSAPI.dll", "dword DhcpServerBackupDatabase(char*, char*)")
# 呼び出し: DhcpServerBackupDatabase(ServerIpAddress, Path)
# ServerIpAddress : LPWSTR optional -> "char*"
# Path : LPWSTR -> "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)。