StrCpyNW

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

LPWSTR StrCpyNW(
    LPWSTR pszDst,
    LPCWSTR pszSrc,
    INT cchMax
);

<DllImport("SHLWAPI.dll", ExactSpelling:=True)>
Public Shared Function StrCpyNW(
    <MarshalAs(UnmanagedType.LPWStr)> pszDst As System.Text.StringBuilder,   ' LPWSTR out
    <MarshalAs(UnmanagedType.LPWStr)> pszSrc As String,   ' LPCWSTR
    cchMax As Integer   ' INT
) As IntPtr
End Function

' pszDst : LPWSTR out
' pszSrc : LPCWSTR
' cchMax : INT
Declare PtrSafe Function StrCpyNW Lib "shlwapi" ( _
    ByVal pszDst As LongPtr, _
    ByVal pszSrc As LongPtr, _
    ByVal cchMax As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

StrCpyNW = ctypes.windll.shlwapi.StrCpyNW
StrCpyNW.restype = wintypes.LPWSTR
StrCpyNW.argtypes = [
    wintypes.LPWSTR,  # pszDst : LPWSTR out
    wintypes.LPCWSTR,  # pszSrc : LPCWSTR
    ctypes.c_int,  # cchMax : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
StrCpyNW = Fiddle::Function.new(
  lib['StrCpyNW'],
  [
    Fiddle::TYPE_VOIDP,  # pszDst : LPWSTR out
    Fiddle::TYPE_VOIDP,  # pszSrc : LPCWSTR
    Fiddle::TYPE_INT,  # cchMax : INT
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "shlwapi")]
extern "system" {
    fn StrCpyNW(
        pszDst: *mut u16,  // LPWSTR out
        pszSrc: *const u16,  // LPCWSTR
        cchMax: i32  // INT
    ) -> *mut u16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll")]
public static extern IntPtr StrCpyNW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszDst, [MarshalAs(UnmanagedType.LPWStr)] string pszSrc, int cchMax);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_StrCpyNW' -Namespace Win32 -PassThru
# $api::StrCpyNW(pszDst, pszSrc, cchMax)

#uselib "SHLWAPI.dll"
#func global StrCpyNW "StrCpyNW" sptr, sptr, sptr
; StrCpyNW varptr(pszDst), pszSrc, cchMax   ; 戻り値は stat
; pszDst : LPWSTR out -> "sptr"
; pszSrc : LPCWSTR -> "sptr"
; cchMax : INT -> "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 "SHLWAPI.dll"
#cfunc global StrCpyNW "StrCpyNW" var, wstr, int
; res = StrCpyNW(pszDst, pszSrc, cchMax)
; pszDst : LPWSTR out -> "var"
; pszSrc : LPCWSTR -> "wstr"
; cchMax : INT -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; LPWSTR StrCpyNW(LPWSTR pszDst, LPCWSTR pszSrc, INT cchMax)
#uselib "SHLWAPI.dll"
#cfunc global StrCpyNW "StrCpyNW" var, wstr, int
; res = StrCpyNW(pszDst, pszSrc, cchMax)
; pszDst : LPWSTR out -> "var"
; pszSrc : LPCWSTR -> "wstr"
; cchMax : INT -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procStrCpyNW = shlwapi.NewProc("StrCpyNW")
)

// pszDst (LPWSTR out), pszSrc (LPCWSTR), cchMax (INT)
r1, _, err := procStrCpyNW.Call(
	uintptr(pszDst),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszSrc))),
	uintptr(cchMax),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPWSTR

function StrCpyNW(
  pszDst: PWideChar;   // LPWSTR out
  pszSrc: PWideChar;   // LPCWSTR
  cchMax: Integer   // INT
): PWideChar; stdcall;
  external 'SHLWAPI.dll' name 'StrCpyNW';

result := DllCall("SHLWAPI\StrCpyNW"
    , "Ptr", pszDst   ; LPWSTR out
    , "WStr", pszSrc   ; LPCWSTR
    , "Int", cchMax   ; INT
    , "Ptr")   ; return: LPWSTR

●StrCpyNW(pszDst, pszSrc, cchMax) = DLL("SHLWAPI.dll", "char* StrCpyNW(char*, char*, int)")
# 呼び出し: StrCpyNW(pszDst, pszSrc, cchMax)
# pszDst : LPWSTR out -> "char*"
# pszSrc : LPCWSTR -> "char*"
# cchMax : INT -> "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)。