SHAnsiToAnsi

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

INT SHAnsiToAnsi(
    LPCSTR pszSrc,
    LPSTR pszDst,
    INT cchBuf
);

<DllImport("SHLWAPI.dll", ExactSpelling:=True)>
Public Shared Function SHAnsiToAnsi(
    <MarshalAs(UnmanagedType.LPStr)> pszSrc As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> pszDst As System.Text.StringBuilder,   ' LPSTR out
    cchBuf As Integer   ' INT
) As Integer
End Function

' pszSrc : LPCSTR
' pszDst : LPSTR out
' cchBuf : INT
Declare PtrSafe Function SHAnsiToAnsi Lib "shlwapi" ( _
    ByVal pszSrc As String, _
    ByVal pszDst As String, _
    ByVal cchBuf 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

SHAnsiToAnsi = ctypes.windll.shlwapi.SHAnsiToAnsi
SHAnsiToAnsi.restype = ctypes.c_int
SHAnsiToAnsi.argtypes = [
    wintypes.LPCSTR,  # pszSrc : LPCSTR
    wintypes.LPSTR,  # pszDst : LPSTR out
    ctypes.c_int,  # cchBuf : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHAnsiToAnsi = Fiddle::Function.new(
  lib['SHAnsiToAnsi'],
  [
    Fiddle::TYPE_VOIDP,  # pszSrc : LPCSTR
    Fiddle::TYPE_VOIDP,  # pszDst : LPSTR out
    Fiddle::TYPE_INT,  # cchBuf : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "shlwapi")]
extern "system" {
    fn SHAnsiToAnsi(
        pszSrc: *const u8,  // LPCSTR
        pszDst: *mut u8,  // LPSTR out
        cchBuf: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "SHLWAPI.dll"
#func global SHAnsiToAnsi "SHAnsiToAnsi" sptr, sptr, sptr
; SHAnsiToAnsi pszSrc, varptr(pszDst), cchBuf   ; 戻り値は stat
; pszSrc : LPCSTR -> "sptr"
; pszDst : LPSTR out -> "sptr"
; cchBuf : 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 SHAnsiToAnsi "SHAnsiToAnsi" str, var, int
; res = SHAnsiToAnsi(pszSrc, pszDst, cchBuf)
; pszSrc : LPCSTR -> "str"
; pszDst : LPSTR out -> "var"
; cchBuf : 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。

; INT SHAnsiToAnsi(LPCSTR pszSrc, LPSTR pszDst, INT cchBuf)
#uselib "SHLWAPI.dll"
#cfunc global SHAnsiToAnsi "SHAnsiToAnsi" str, var, int
; res = SHAnsiToAnsi(pszSrc, pszDst, cchBuf)
; pszSrc : LPCSTR -> "str"
; pszDst : LPSTR out -> "var"
; cchBuf : 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")
	procSHAnsiToAnsi = shlwapi.NewProc("SHAnsiToAnsi")
)

// pszSrc (LPCSTR), pszDst (LPSTR out), cchBuf (INT)
r1, _, err := procSHAnsiToAnsi.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszSrc))),
	uintptr(pszDst),
	uintptr(cchBuf),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SHAnsiToAnsi(
  pszSrc: PAnsiChar;   // LPCSTR
  pszDst: PAnsiChar;   // LPSTR out
  cchBuf: Integer   // INT
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'SHAnsiToAnsi';

result := DllCall("SHLWAPI\SHAnsiToAnsi"
    , "AStr", pszSrc   ; LPCSTR
    , "Ptr", pszDst   ; LPSTR out
    , "Int", cchBuf   ; INT
    , "Int")   ; return: INT

●SHAnsiToAnsi(pszSrc, pszDst, cchBuf) = DLL("SHLWAPI.dll", "int SHAnsiToAnsi(char*, char*, int)")
# 呼び出し: SHAnsiToAnsi(pszSrc, pszDst, cchBuf)
# pszSrc : LPCSTR -> "char*"
# pszDst : LPSTR out -> "char*"
# cchBuf : 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)。