FindFirstVolumeA

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

HANDLE FindFirstVolumeA(
    LPSTR lpszVolumeName,
    DWORD cchBufferLength
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FindFirstVolumeA(
    <MarshalAs(UnmanagedType.LPStr)> lpszVolumeName As System.Text.StringBuilder,   ' LPSTR out
    cchBufferLength As UInteger   ' DWORD
) As IntPtr
End Function

' lpszVolumeName : LPSTR out
' cchBufferLength : DWORD
Declare PtrSafe Function FindFirstVolumeA Lib "kernel32" ( _
    ByVal lpszVolumeName As String, _
    ByVal cchBufferLength As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

FindFirstVolumeA = ctypes.windll.kernel32.FindFirstVolumeA
FindFirstVolumeA.restype = ctypes.c_void_p
FindFirstVolumeA.argtypes = [
    wintypes.LPSTR,  # lpszVolumeName : LPSTR out
    wintypes.DWORD,  # cchBufferLength : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FindFirstVolumeA = Fiddle::Function.new(
  lib['FindFirstVolumeA'],
  [
    Fiddle::TYPE_VOIDP,  # lpszVolumeName : LPSTR out
    -Fiddle::TYPE_INT,  # cchBufferLength : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn FindFirstVolumeA(
        lpszVolumeName: *mut u8,  // LPSTR out
        cchBufferLength: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr FindFirstVolumeA([MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpszVolumeName, uint cchBufferLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FindFirstVolumeA' -Namespace Win32 -PassThru
# $api::FindFirstVolumeA(lpszVolumeName, cchBufferLength)

#uselib "KERNEL32.dll"
#func global FindFirstVolumeA "FindFirstVolumeA" sptr, sptr
; FindFirstVolumeA varptr(lpszVolumeName), cchBufferLength   ; 戻り値は stat
; lpszVolumeName : LPSTR out -> "sptr"
; cchBufferLength : 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 "KERNEL32.dll"
#cfunc global FindFirstVolumeA "FindFirstVolumeA" var, int
; res = FindFirstVolumeA(lpszVolumeName, cchBufferLength)
; lpszVolumeName : LPSTR out -> "var"
; cchBufferLength : 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。

; HANDLE FindFirstVolumeA(LPSTR lpszVolumeName, DWORD cchBufferLength)
#uselib "KERNEL32.dll"
#cfunc global FindFirstVolumeA "FindFirstVolumeA" var, int
; res = FindFirstVolumeA(lpszVolumeName, cchBufferLength)
; lpszVolumeName : LPSTR out -> "var"
; cchBufferLength : 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")
	procFindFirstVolumeA = kernel32.NewProc("FindFirstVolumeA")
)

// lpszVolumeName (LPSTR out), cchBufferLength (DWORD)
r1, _, err := procFindFirstVolumeA.Call(
	uintptr(lpszVolumeName),
	uintptr(cchBufferLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function FindFirstVolumeA(
  lpszVolumeName: PAnsiChar;   // LPSTR out
  cchBufferLength: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'FindFirstVolumeA';

result := DllCall("KERNEL32\FindFirstVolumeA"
    , "Ptr", lpszVolumeName   ; LPSTR out
    , "UInt", cchBufferLength   ; DWORD
    , "Ptr")   ; return: HANDLE

●FindFirstVolumeA(lpszVolumeName, cchBufferLength) = DLL("KERNEL32.dll", "void* FindFirstVolumeA(char*, dword)")
# 呼び出し: FindFirstVolumeA(lpszVolumeName, cchBufferLength)
# lpszVolumeName : LPSTR out -> "char*"
# cchBufferLength : 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)。