PathCompactPathExW

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

BOOL PathCompactPathExW(
    LPWSTR pszOut,
    LPCWSTR pszSrc,
    DWORD cchMax,
    DWORD dwFlags
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function PathCompactPathExW(
    <MarshalAs(UnmanagedType.LPWStr)> pszOut As System.Text.StringBuilder,   ' LPWSTR out
    <MarshalAs(UnmanagedType.LPWStr)> pszSrc As String,   ' LPCWSTR
    cchMax As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As Boolean
End Function

' pszOut : LPWSTR out
' pszSrc : LPCWSTR
' cchMax : DWORD
' dwFlags : DWORD
Declare PtrSafe Function PathCompactPathExW Lib "shlwapi" ( _
    ByVal pszOut As LongPtr, _
    ByVal pszSrc As LongPtr, _
    ByVal cchMax As Long, _
    ByVal dwFlags As Long) 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

PathCompactPathExW = ctypes.windll.shlwapi.PathCompactPathExW
PathCompactPathExW.restype = wintypes.BOOL
PathCompactPathExW.argtypes = [
    wintypes.LPWSTR,  # pszOut : LPWSTR out
    wintypes.LPCWSTR,  # pszSrc : LPCWSTR
    wintypes.DWORD,  # cchMax : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
PathCompactPathExW = Fiddle::Function.new(
  lib['PathCompactPathExW'],
  [
    Fiddle::TYPE_VOIDP,  # pszOut : LPWSTR out
    Fiddle::TYPE_VOIDP,  # pszSrc : LPCWSTR
    -Fiddle::TYPE_INT,  # cchMax : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn PathCompactPathExW(
        pszOut: *mut u16,  // LPWSTR out
        pszSrc: *const u16,  // LPCWSTR
        cchMax: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern bool PathCompactPathExW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszOut, [MarshalAs(UnmanagedType.LPWStr)] string pszSrc, uint cchMax, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_PathCompactPathExW' -Namespace Win32 -PassThru
# $api::PathCompactPathExW(pszOut, pszSrc, cchMax, dwFlags)

#uselib "SHLWAPI.dll"
#func global PathCompactPathExW "PathCompactPathExW" wptr, wptr, wptr, wptr
; PathCompactPathExW varptr(pszOut), pszSrc, cchMax, dwFlags   ; 戻り値は stat
; pszOut : LPWSTR out -> "wptr"
; pszSrc : LPCWSTR -> "wptr"
; cchMax : DWORD -> "wptr"
; dwFlags : DWORD -> "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 "SHLWAPI.dll"
#cfunc global PathCompactPathExW "PathCompactPathExW" var, wstr, int, int
; res = PathCompactPathExW(pszOut, pszSrc, cchMax, dwFlags)
; pszOut : LPWSTR out -> "var"
; pszSrc : LPCWSTR -> "wstr"
; cchMax : DWORD -> "int"
; dwFlags : DWORD -> "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。

; BOOL PathCompactPathExW(LPWSTR pszOut, LPCWSTR pszSrc, DWORD cchMax, DWORD dwFlags)
#uselib "SHLWAPI.dll"
#cfunc global PathCompactPathExW "PathCompactPathExW" var, wstr, int, int
; res = PathCompactPathExW(pszOut, pszSrc, cchMax, dwFlags)
; pszOut : LPWSTR out -> "var"
; pszSrc : LPCWSTR -> "wstr"
; cchMax : DWORD -> "int"
; dwFlags : DWORD -> "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")
	procPathCompactPathExW = shlwapi.NewProc("PathCompactPathExW")
)

// pszOut (LPWSTR out), pszSrc (LPCWSTR), cchMax (DWORD), dwFlags (DWORD)
r1, _, err := procPathCompactPathExW.Call(
	uintptr(pszOut),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszSrc))),
	uintptr(cchMax),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function PathCompactPathExW(
  pszOut: PWideChar;   // LPWSTR out
  pszSrc: PWideChar;   // LPCWSTR
  cchMax: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): BOOL; stdcall;
  external 'SHLWAPI.dll' name 'PathCompactPathExW';

result := DllCall("SHLWAPI\PathCompactPathExW"
    , "Ptr", pszOut   ; LPWSTR out
    , "WStr", pszSrc   ; LPCWSTR
    , "UInt", cchMax   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: BOOL

●PathCompactPathExW(pszOut, pszSrc, cchMax, dwFlags) = DLL("SHLWAPI.dll", "bool PathCompactPathExW(char*, char*, dword, dword)")
# 呼び出し: PathCompactPathExW(pszOut, pszSrc, cchMax, dwFlags)
# pszOut : LPWSTR out -> "char*"
# pszSrc : LPCWSTR -> "char*"
# cchMax : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# 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。