QueryDosDeviceW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

DWORD QueryDosDeviceW(
    LPCWSTR lpDeviceName,   // optional
    LPWSTR lpTargetPath,   // optional
    DWORD ucchMax
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function QueryDosDeviceW(
    <MarshalAs(UnmanagedType.LPWStr)> lpDeviceName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpTargetPath As System.Text.StringBuilder,   ' LPWSTR optional, out
    ucchMax As UInteger   ' DWORD
) As UInteger
End Function

' lpDeviceName : LPCWSTR optional
' lpTargetPath : LPWSTR optional, out
' ucchMax : DWORD
Declare PtrSafe Function QueryDosDeviceW Lib "kernel32" ( _
    ByVal lpDeviceName As LongPtr, _
    ByVal lpTargetPath As LongPtr, _
    ByVal ucchMax 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

QueryDosDeviceW = ctypes.windll.kernel32.QueryDosDeviceW
QueryDosDeviceW.restype = wintypes.DWORD
QueryDosDeviceW.argtypes = [
    wintypes.LPCWSTR,  # lpDeviceName : LPCWSTR optional
    wintypes.LPWSTR,  # lpTargetPath : LPWSTR optional, out
    wintypes.DWORD,  # ucchMax : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
QueryDosDeviceW = Fiddle::Function.new(
  lib['QueryDosDeviceW'],
  [
    Fiddle::TYPE_VOIDP,  # lpDeviceName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpTargetPath : LPWSTR optional, out
    -Fiddle::TYPE_INT,  # ucchMax : DWORD
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn QueryDosDeviceW(
        lpDeviceName: *const u16,  // LPCWSTR optional
        lpTargetPath: *mut u16,  // LPWSTR optional, out
        ucchMax: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern uint QueryDosDeviceW([MarshalAs(UnmanagedType.LPWStr)] string lpDeviceName, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpTargetPath, uint ucchMax);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_QueryDosDeviceW' -Namespace Win32 -PassThru
# $api::QueryDosDeviceW(lpDeviceName, lpTargetPath, ucchMax)

#uselib "KERNEL32.dll"
#func global QueryDosDeviceW "QueryDosDeviceW" wptr, wptr, wptr
; QueryDosDeviceW lpDeviceName, varptr(lpTargetPath), ucchMax   ; 戻り値は stat
; lpDeviceName : LPCWSTR optional -> "wptr"
; lpTargetPath : LPWSTR optional, out -> "wptr"
; ucchMax : 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 "KERNEL32.dll"
#cfunc global QueryDosDeviceW "QueryDosDeviceW" wstr, var, int
; res = QueryDosDeviceW(lpDeviceName, lpTargetPath, ucchMax)
; lpDeviceName : LPCWSTR optional -> "wstr"
; lpTargetPath : LPWSTR optional, out -> "var"
; ucchMax : 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。

; DWORD QueryDosDeviceW(LPCWSTR lpDeviceName, LPWSTR lpTargetPath, DWORD ucchMax)
#uselib "KERNEL32.dll"
#cfunc global QueryDosDeviceW "QueryDosDeviceW" wstr, var, int
; res = QueryDosDeviceW(lpDeviceName, lpTargetPath, ucchMax)
; lpDeviceName : LPCWSTR optional -> "wstr"
; lpTargetPath : LPWSTR optional, out -> "var"
; ucchMax : 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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procQueryDosDeviceW = kernel32.NewProc("QueryDosDeviceW")
)

// lpDeviceName (LPCWSTR optional), lpTargetPath (LPWSTR optional, out), ucchMax (DWORD)
r1, _, err := procQueryDosDeviceW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpDeviceName))),
	uintptr(lpTargetPath),
	uintptr(ucchMax),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function QueryDosDeviceW(
  lpDeviceName: PWideChar;   // LPCWSTR optional
  lpTargetPath: PWideChar;   // LPWSTR optional, out
  ucchMax: DWORD   // DWORD
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'QueryDosDeviceW';

result := DllCall("KERNEL32\QueryDosDeviceW"
    , "WStr", lpDeviceName   ; LPCWSTR optional
    , "Ptr", lpTargetPath   ; LPWSTR optional, out
    , "UInt", ucchMax   ; DWORD
    , "UInt")   ; return: DWORD

●QueryDosDeviceW(lpDeviceName, lpTargetPath, ucchMax) = DLL("KERNEL32.dll", "dword QueryDosDeviceW(char*, char*, dword)")
# 呼び出し: QueryDosDeviceW(lpDeviceName, lpTargetPath, ucchMax)
# lpDeviceName : LPCWSTR optional -> "char*"
# lpTargetPath : LPWSTR optional, out -> "char*"
# ucchMax : 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。