WNetSetLastErrorW

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

void WNetSetLastErrorW(
    DWORD err,
    LPWSTR lpError,
    LPWSTR lpProviders
);

<DllImport("MPR.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Sub WNetSetLastErrorW(
    err As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> lpError As String,   ' LPWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpProviders As String   ' LPWSTR
)
End Sub

' err : DWORD
' lpError : LPWSTR
' lpProviders : LPWSTR
Declare PtrSafe Sub WNetSetLastErrorW Lib "mpr" ( _
    ByVal err As Long, _
    ByVal lpError As LongPtr, _
    ByVal lpProviders As LongPtr)
' 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

WNetSetLastErrorW = ctypes.windll.mpr.WNetSetLastErrorW
WNetSetLastErrorW.restype = None
WNetSetLastErrorW.argtypes = [
    wintypes.DWORD,  # err : DWORD
    wintypes.LPCWSTR,  # lpError : LPWSTR
    wintypes.LPCWSTR,  # lpProviders : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MPR.dll')
WNetSetLastErrorW = Fiddle::Function.new(
  lib['WNetSetLastErrorW'],
  [
    -Fiddle::TYPE_INT,  # err : DWORD
    Fiddle::TYPE_VOIDP,  # lpError : LPWSTR
    Fiddle::TYPE_VOIDP,  # lpProviders : LPWSTR
  ],
  Fiddle::TYPE_VOID)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "mpr")]
extern "system" {
    fn WNetSetLastErrorW(
        err: u32,  // DWORD
        lpError: *mut u16,  // LPWSTR
        lpProviders: *mut u16  // LPWSTR
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MPR.dll", CharSet = CharSet.Unicode)]
public static extern void WNetSetLastErrorW(uint err, [MarshalAs(UnmanagedType.LPWStr)] string lpError, [MarshalAs(UnmanagedType.LPWStr)] string lpProviders);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MPR_WNetSetLastErrorW' -Namespace Win32 -PassThru
# $api::WNetSetLastErrorW(err, lpError, lpProviders)

#uselib "MPR.dll"
#func global WNetSetLastErrorW "WNetSetLastErrorW" wptr, wptr, wptr
; WNetSetLastErrorW err, lpError, lpProviders
; err : DWORD -> "wptr"
; lpError : LPWSTR -> "wptr"
; lpProviders : LPWSTR -> "wptr"

#uselib "MPR.dll"
#func global WNetSetLastErrorW "WNetSetLastErrorW" int, wstr, wstr
; WNetSetLastErrorW err, lpError, lpProviders
; err : DWORD -> "int"
; lpError : LPWSTR -> "wstr"
; lpProviders : LPWSTR -> "wstr"

; void WNetSetLastErrorW(DWORD err, LPWSTR lpError, LPWSTR lpProviders)
#uselib "MPR.dll"
#func global WNetSetLastErrorW "WNetSetLastErrorW" int, wstr, wstr
; WNetSetLastErrorW err, lpError, lpProviders
; err : DWORD -> "int"
; lpError : LPWSTR -> "wstr"
; lpProviders : LPWSTR -> "wstr"

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

var (
	mpr = windows.NewLazySystemDLL("MPR.dll")
	procWNetSetLastErrorW = mpr.NewProc("WNetSetLastErrorW")
)

// err (DWORD), lpError (LPWSTR), lpProviders (LPWSTR)
r1, _, err := procWNetSetLastErrorW.Call(
	uintptr(err),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpError))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpProviders))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure WNetSetLastErrorW(
  err: DWORD;   // DWORD
  lpError: PWideChar;   // LPWSTR
  lpProviders: PWideChar   // LPWSTR
); stdcall;
  external 'MPR.dll' name 'WNetSetLastErrorW';

result := DllCall("MPR\WNetSetLastErrorW"
    , "UInt", err   ; DWORD
    , "WStr", lpError   ; LPWSTR
    , "WStr", lpProviders   ; LPWSTR
    , "Int")   ; return: void

●WNetSetLastErrorW(err, lpError, lpProviders) = DLL("MPR.dll", "int WNetSetLastErrorW(dword, char*, char*)")
# 呼び出し: WNetSetLastErrorW(err, lpError, lpProviders)
# err : DWORD -> "dword"
# lpError : LPWSTR -> "char*"
# lpProviders : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。