InstallPerfDllW

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

DWORD InstallPerfDllW(
    LPCWSTR szComputerName,   // optional
    LPCWSTR lpIniFile,
    UINT_PTR dwFlags
);

<DllImport("loadperf.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function InstallPerfDllW(
    <MarshalAs(UnmanagedType.LPWStr)> szComputerName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpIniFile As String,   ' LPCWSTR
    dwFlags As UIntPtr   ' UINT_PTR
) As UInteger
End Function

' szComputerName : LPCWSTR optional
' lpIniFile : LPCWSTR
' dwFlags : UINT_PTR
Declare PtrSafe Function InstallPerfDllW Lib "loadperf" ( _
    ByVal szComputerName As LongPtr, _
    ByVal lpIniFile As LongPtr, _
    ByVal dwFlags As LongPtr) 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

InstallPerfDllW = ctypes.windll.loadperf.InstallPerfDllW
InstallPerfDllW.restype = wintypes.DWORD
InstallPerfDllW.argtypes = [
    wintypes.LPCWSTR,  # szComputerName : LPCWSTR optional
    wintypes.LPCWSTR,  # lpIniFile : LPCWSTR
    ctypes.c_size_t,  # dwFlags : UINT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('loadperf.dll')
InstallPerfDllW = Fiddle::Function.new(
  lib['InstallPerfDllW'],
  [
    Fiddle::TYPE_VOIDP,  # szComputerName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpIniFile : LPCWSTR
    Fiddle::TYPE_UINTPTR_T,  # dwFlags : UINT_PTR
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "loadperf")]
extern "system" {
    fn InstallPerfDllW(
        szComputerName: *const u16,  // LPCWSTR optional
        lpIniFile: *const u16,  // LPCWSTR
        dwFlags: usize  // UINT_PTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("loadperf.dll", CharSet = CharSet.Unicode)]
public static extern uint InstallPerfDllW([MarshalAs(UnmanagedType.LPWStr)] string szComputerName, [MarshalAs(UnmanagedType.LPWStr)] string lpIniFile, UIntPtr dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'loadperf_InstallPerfDllW' -Namespace Win32 -PassThru
# $api::InstallPerfDllW(szComputerName, lpIniFile, dwFlags)

#uselib "loadperf.dll"
#func global InstallPerfDllW "InstallPerfDllW" wptr, wptr, wptr
; InstallPerfDllW szComputerName, lpIniFile, dwFlags   ; 戻り値は stat
; szComputerName : LPCWSTR optional -> "wptr"
; lpIniFile : LPCWSTR -> "wptr"
; dwFlags : UINT_PTR -> "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 "loadperf.dll"
#cfunc global InstallPerfDllW "InstallPerfDllW" wstr, wstr, sptr
; res = InstallPerfDllW(szComputerName, lpIniFile, dwFlags)
; szComputerName : LPCWSTR optional -> "wstr"
; lpIniFile : LPCWSTR -> "wstr"
; dwFlags : UINT_PTR -> "sptr"

; DWORD InstallPerfDllW(LPCWSTR szComputerName, LPCWSTR lpIniFile, UINT_PTR dwFlags)
#uselib "loadperf.dll"
#cfunc global InstallPerfDllW "InstallPerfDllW" wstr, wstr, intptr
; res = InstallPerfDllW(szComputerName, lpIniFile, dwFlags)
; szComputerName : LPCWSTR optional -> "wstr"
; lpIniFile : LPCWSTR -> "wstr"
; dwFlags : UINT_PTR -> "intptr"

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

var (
	loadperf = windows.NewLazySystemDLL("loadperf.dll")
	procInstallPerfDllW = loadperf.NewProc("InstallPerfDllW")
)

// szComputerName (LPCWSTR optional), lpIniFile (LPCWSTR), dwFlags (UINT_PTR)
r1, _, err := procInstallPerfDllW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szComputerName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpIniFile))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function InstallPerfDllW(
  szComputerName: PWideChar;   // LPCWSTR optional
  lpIniFile: PWideChar;   // LPCWSTR
  dwFlags: NativeUInt   // UINT_PTR
): DWORD; stdcall;
  external 'loadperf.dll' name 'InstallPerfDllW';

result := DllCall("loadperf\InstallPerfDllW"
    , "WStr", szComputerName   ; LPCWSTR optional
    , "WStr", lpIniFile   ; LPCWSTR
    , "UPtr", dwFlags   ; UINT_PTR
    , "UInt")   ; return: DWORD

●InstallPerfDllW(szComputerName, lpIniFile, dwFlags) = DLL("loadperf.dll", "dword InstallPerfDllW(char*, char*, int)")
# 呼び出し: InstallPerfDllW(szComputerName, lpIniFile, dwFlags)
# szComputerName : LPCWSTR optional -> "char*"
# lpIniFile : LPCWSTR -> "char*"
# dwFlags : UINT_PTR -> "int"
# 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。