PathBuildRootW

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

LPWSTR PathBuildRootW(
    LPWSTR pszRoot,
    INT iDrive
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function PathBuildRootW(
    <MarshalAs(UnmanagedType.LPWStr)> pszRoot As System.Text.StringBuilder,   ' LPWSTR out
    iDrive As Integer   ' INT
) As IntPtr
End Function

' pszRoot : LPWSTR out
' iDrive : INT
Declare PtrSafe Function PathBuildRootW Lib "shlwapi" ( _
    ByVal pszRoot As LongPtr, _
    ByVal iDrive As Long) As LongPtr
' 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

PathBuildRootW = ctypes.windll.shlwapi.PathBuildRootW
PathBuildRootW.restype = wintypes.LPWSTR
PathBuildRootW.argtypes = [
    wintypes.LPWSTR,  # pszRoot : LPWSTR out
    ctypes.c_int,  # iDrive : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
PathBuildRootW = Fiddle::Function.new(
  lib['PathBuildRootW'],
  [
    Fiddle::TYPE_VOIDP,  # pszRoot : LPWSTR out
    Fiddle::TYPE_INT,  # iDrive : INT
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

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

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern IntPtr PathBuildRootW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszRoot, int iDrive);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_PathBuildRootW' -Namespace Win32 -PassThru
# $api::PathBuildRootW(pszRoot, iDrive)

#uselib "SHLWAPI.dll"
#func global PathBuildRootW "PathBuildRootW" wptr, wptr
; PathBuildRootW varptr(pszRoot), iDrive   ; 戻り値は stat
; pszRoot : LPWSTR out -> "wptr"
; iDrive : INT -> "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 PathBuildRootW "PathBuildRootW" var, int
; res = PathBuildRootW(pszRoot, iDrive)
; pszRoot : LPWSTR out -> "var"
; iDrive : 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 PathBuildRootW(LPWSTR pszRoot, INT iDrive)
#uselib "SHLWAPI.dll"
#cfunc global PathBuildRootW "PathBuildRootW" var, int
; res = PathBuildRootW(pszRoot, iDrive)
; pszRoot : LPWSTR out -> "var"
; iDrive : 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")
	procPathBuildRootW = shlwapi.NewProc("PathBuildRootW")
)

// pszRoot (LPWSTR out), iDrive (INT)
r1, _, err := procPathBuildRootW.Call(
	uintptr(pszRoot),
	uintptr(iDrive),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPWSTR

function PathBuildRootW(
  pszRoot: PWideChar;   // LPWSTR out
  iDrive: Integer   // INT
): PWideChar; stdcall;
  external 'SHLWAPI.dll' name 'PathBuildRootW';

result := DllCall("SHLWAPI\PathBuildRootW"
    , "Ptr", pszRoot   ; LPWSTR out
    , "Int", iDrive   ; INT
    , "Ptr")   ; return: LPWSTR

●PathBuildRootW(pszRoot, iDrive) = DLL("SHLWAPI.dll", "char* PathBuildRootW(char*, int)")
# 呼び出し: PathBuildRootW(pszRoot, iDrive)
# pszRoot : LPWSTR out -> "char*"
# iDrive : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。