ScLocalPathFromUNC

// MAPI32.dll
#include <windows.h>

INT ScLocalPathFromUNC(
    LPSTR lpszUNC,
    LPSTR lpszLocal,
    DWORD cchLocal
);

<DllImport("MAPI32.dll", ExactSpelling:=True)>
Public Shared Function ScLocalPathFromUNC(
    <MarshalAs(UnmanagedType.LPStr)> lpszUNC As String,   ' LPSTR
    <MarshalAs(UnmanagedType.LPStr)> lpszLocal As String,   ' LPSTR
    cchLocal As UInteger   ' DWORD
) As Integer
End Function

' lpszUNC : LPSTR
' lpszLocal : LPSTR
' cchLocal : DWORD
Declare PtrSafe Function ScLocalPathFromUNC Lib "mapi32" ( _
    ByVal lpszUNC As String, _
    ByVal lpszLocal As String, _
    ByVal cchLocal As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ScLocalPathFromUNC = ctypes.windll.mapi32.ScLocalPathFromUNC
ScLocalPathFromUNC.restype = ctypes.c_int
ScLocalPathFromUNC.argtypes = [
    wintypes.LPCSTR,  # lpszUNC : LPSTR
    wintypes.LPCSTR,  # lpszLocal : LPSTR
    wintypes.DWORD,  # cchLocal : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MAPI32.dll')
ScLocalPathFromUNC = Fiddle::Function.new(
  lib['ScLocalPathFromUNC'],
  [
    Fiddle::TYPE_VOIDP,  # lpszUNC : LPSTR
    Fiddle::TYPE_VOIDP,  # lpszLocal : LPSTR
    -Fiddle::TYPE_INT,  # cchLocal : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "mapi32")]
extern "system" {
    fn ScLocalPathFromUNC(
        lpszUNC: *mut u8,  // LPSTR
        lpszLocal: *mut u8,  // LPSTR
        cchLocal: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MAPI32.dll")]
public static extern int ScLocalPathFromUNC([MarshalAs(UnmanagedType.LPStr)] string lpszUNC, [MarshalAs(UnmanagedType.LPStr)] string lpszLocal, uint cchLocal);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MAPI32_ScLocalPathFromUNC' -Namespace Win32 -PassThru
# $api::ScLocalPathFromUNC(lpszUNC, lpszLocal, cchLocal)

#uselib "MAPI32.dll"
#func global ScLocalPathFromUNC "ScLocalPathFromUNC" sptr, sptr, sptr
; ScLocalPathFromUNC lpszUNC, lpszLocal, cchLocal   ; 戻り値は stat
; lpszUNC : LPSTR -> "sptr"
; lpszLocal : LPSTR -> "sptr"
; cchLocal : DWORD -> "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 "MAPI32.dll"
#cfunc global ScLocalPathFromUNC "ScLocalPathFromUNC" str, str, int
; res = ScLocalPathFromUNC(lpszUNC, lpszLocal, cchLocal)
; lpszUNC : LPSTR -> "str"
; lpszLocal : LPSTR -> "str"
; cchLocal : DWORD -> "int"

; INT ScLocalPathFromUNC(LPSTR lpszUNC, LPSTR lpszLocal, DWORD cchLocal)
#uselib "MAPI32.dll"
#cfunc global ScLocalPathFromUNC "ScLocalPathFromUNC" str, str, int
; res = ScLocalPathFromUNC(lpszUNC, lpszLocal, cchLocal)
; lpszUNC : LPSTR -> "str"
; lpszLocal : LPSTR -> "str"
; cchLocal : DWORD -> "int"

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

var (
	mapi32 = windows.NewLazySystemDLL("MAPI32.dll")
	procScLocalPathFromUNC = mapi32.NewProc("ScLocalPathFromUNC")
)

// lpszUNC (LPSTR), lpszLocal (LPSTR), cchLocal (DWORD)
r1, _, err := procScLocalPathFromUNC.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszUNC))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszLocal))),
	uintptr(cchLocal),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ScLocalPathFromUNC(
  lpszUNC: PAnsiChar;   // LPSTR
  lpszLocal: PAnsiChar;   // LPSTR
  cchLocal: DWORD   // DWORD
): Integer; stdcall;
  external 'MAPI32.dll' name 'ScLocalPathFromUNC';

result := DllCall("MAPI32\ScLocalPathFromUNC"
    , "AStr", lpszUNC   ; LPSTR
    , "AStr", lpszLocal   ; LPSTR
    , "UInt", cchLocal   ; DWORD
    , "Int")   ; return: INT

●ScLocalPathFromUNC(lpszUNC, lpszLocal, cchLocal) = DLL("MAPI32.dll", "int ScLocalPathFromUNC(char*, char*, dword)")
# 呼び出し: ScLocalPathFromUNC(lpszUNC, lpszLocal, cchLocal)
# lpszUNC : LPSTR -> "char*"
# lpszLocal : LPSTR -> "char*"
# cchLocal : 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)。