PathCchAddBackslashEx

// api-ms-win-core-path-l1-1-0.dll
#include <windows.h>

HRESULT PathCchAddBackslashEx(
    LPWSTR pszPath,
    UINT_PTR cchPath,
    LPWSTR* ppszEnd,   // optional
    UINT_PTR* pcchRemaining   // optional
);

<DllImport("api-ms-win-core-path-l1-1-0.dll", ExactSpelling:=True)>
Public Shared Function PathCchAddBackslashEx(
    <MarshalAs(UnmanagedType.LPWStr)> pszPath As System.Text.StringBuilder,   ' LPWSTR in/out
    cchPath As UIntPtr,   ' UINT_PTR
    ppszEnd As IntPtr,   ' LPWSTR* optional, out
    pcchRemaining As IntPtr   ' UINT_PTR* optional, out
) As Integer
End Function

' pszPath : LPWSTR in/out
' cchPath : UINT_PTR
' ppszEnd : LPWSTR* optional, out
' pcchRemaining : UINT_PTR* optional, out
Declare PtrSafe Function PathCchAddBackslashEx Lib "api-ms-win-core-path-l1-1-0" ( _
    ByVal pszPath As LongPtr, _
    ByVal cchPath As LongPtr, _
    ByVal ppszEnd As LongPtr, _
    ByVal pcchRemaining 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

PathCchAddBackslashEx = ctypes.windll.LoadLibrary("api-ms-win-core-path-l1-1-0.dll").PathCchAddBackslashEx
PathCchAddBackslashEx.restype = ctypes.c_int
PathCchAddBackslashEx.argtypes = [
    wintypes.LPWSTR,  # pszPath : LPWSTR in/out
    ctypes.c_size_t,  # cchPath : UINT_PTR
    ctypes.c_void_p,  # ppszEnd : LPWSTR* optional, out
    ctypes.POINTER(ctypes.c_size_t),  # pcchRemaining : UINT_PTR* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('api-ms-win-core-path-l1-1-0.dll')
PathCchAddBackslashEx = Fiddle::Function.new(
  lib['PathCchAddBackslashEx'],
  [
    Fiddle::TYPE_VOIDP,  # pszPath : LPWSTR in/out
    Fiddle::TYPE_UINTPTR_T,  # cchPath : UINT_PTR
    Fiddle::TYPE_VOIDP,  # ppszEnd : LPWSTR* optional, out
    Fiddle::TYPE_VOIDP,  # pcchRemaining : UINT_PTR* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "api-ms-win-core-path-l1-1-0")]
extern "system" {
    fn PathCchAddBackslashEx(
        pszPath: *mut u16,  // LPWSTR in/out
        cchPath: usize,  // UINT_PTR
        ppszEnd: *mut *mut u16,  // LPWSTR* optional, out
        pcchRemaining: *mut usize  // UINT_PTR* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("api-ms-win-core-path-l1-1-0.dll")]
public static extern int PathCchAddBackslashEx([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszPath, UIntPtr cchPath, IntPtr ppszEnd, IntPtr pcchRemaining);
"@
$api = Add-Type -MemberDefinition $sig -Name 'api-ms-win-core-path-l1-1-0_PathCchAddBackslashEx' -Namespace Win32 -PassThru
# $api::PathCchAddBackslashEx(pszPath, cchPath, ppszEnd, pcchRemaining)

#uselib "api-ms-win-core-path-l1-1-0.dll"
#func global PathCchAddBackslashEx "PathCchAddBackslashEx" sptr, sptr, sptr, sptr
; PathCchAddBackslashEx varptr(pszPath), cchPath, varptr(ppszEnd), varptr(pcchRemaining)   ; 戻り値は stat
; pszPath : LPWSTR in/out -> "sptr"
; cchPath : UINT_PTR -> "sptr"
; ppszEnd : LPWSTR* optional, out -> "sptr"
; pcchRemaining : UINT_PTR* optional, out -> "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 "api-ms-win-core-path-l1-1-0.dll"
#cfunc global PathCchAddBackslashEx "PathCchAddBackslashEx" var, sptr, var, var
; res = PathCchAddBackslashEx(pszPath, cchPath, ppszEnd, pcchRemaining)
; pszPath : LPWSTR in/out -> "var"
; cchPath : UINT_PTR -> "sptr"
; ppszEnd : LPWSTR* optional, out -> "var"
; pcchRemaining : UINT_PTR* optional, out -> "var"
; ※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。

; HRESULT PathCchAddBackslashEx(LPWSTR pszPath, UINT_PTR cchPath, LPWSTR* ppszEnd, UINT_PTR* pcchRemaining)
#uselib "api-ms-win-core-path-l1-1-0.dll"
#cfunc global PathCchAddBackslashEx "PathCchAddBackslashEx" var, intptr, var, var
; res = PathCchAddBackslashEx(pszPath, cchPath, ppszEnd, pcchRemaining)
; pszPath : LPWSTR in/out -> "var"
; cchPath : UINT_PTR -> "intptr"
; ppszEnd : LPWSTR* optional, out -> "var"
; pcchRemaining : UINT_PTR* optional, out -> "var"
; ※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 (
	api_ms_win_core_path_l1_1_0 = windows.NewLazySystemDLL("api-ms-win-core-path-l1-1-0.dll")
	procPathCchAddBackslashEx = api_ms_win_core_path_l1_1_0.NewProc("PathCchAddBackslashEx")
)

// pszPath (LPWSTR in/out), cchPath (UINT_PTR), ppszEnd (LPWSTR* optional, out), pcchRemaining (UINT_PTR* optional, out)
r1, _, err := procPathCchAddBackslashEx.Call(
	uintptr(pszPath),
	uintptr(cchPath),
	uintptr(ppszEnd),
	uintptr(pcchRemaining),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PathCchAddBackslashEx(
  pszPath: PWideChar;   // LPWSTR in/out
  cchPath: NativeUInt;   // UINT_PTR
  ppszEnd: PPWideChar;   // LPWSTR* optional, out
  pcchRemaining: Pointer   // UINT_PTR* optional, out
): Integer; stdcall;
  external 'api-ms-win-core-path-l1-1-0.dll' name 'PathCchAddBackslashEx';

result := DllCall("api-ms-win-core-path-l1-1-0\PathCchAddBackslashEx"
    , "Ptr", pszPath   ; LPWSTR in/out
    , "UPtr", cchPath   ; UINT_PTR
    , "Ptr", ppszEnd   ; LPWSTR* optional, out
    , "Ptr", pcchRemaining   ; UINT_PTR* optional, out
    , "Int")   ; return: HRESULT

●PathCchAddBackslashEx(pszPath, cchPath, ppszEnd, pcchRemaining) = DLL("api-ms-win-core-path-l1-1-0.dll", "int PathCchAddBackslashEx(char*, int, void*, void*)")
# 呼び出し: PathCchAddBackslashEx(pszPath, cchPath, ppszEnd, pcchRemaining)
# pszPath : LPWSTR in/out -> "char*"
# cchPath : UINT_PTR -> "int"
# ppszEnd : LPWSTR* optional, out -> "void*"
# pcchRemaining : UINT_PTR* optional, out -> "void*"
# 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)。