GetPrinterDriverW

// winspool.drv  (Unicode / -W)
#include <windows.h>

BOOL GetPrinterDriverW(
    PRINTER_HANDLE hPrinter,
    LPCWSTR pEnvironment,   // optional
    DWORD Level,
    BYTE* pDriverInfo,   // optional
    DWORD cbBuf,
    DWORD* pcbNeeded
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetPrinterDriverW(
    hPrinter As PRINTER_HANDLE,   ' PRINTER_HANDLE
    <MarshalAs(UnmanagedType.LPWStr)> pEnvironment As String,   ' LPCWSTR optional
    Level As UInteger,   ' DWORD
    pDriverInfo As IntPtr,   ' BYTE* optional, out
    cbBuf As UInteger,   ' DWORD
    <Out> ByRef pcbNeeded As UInteger   ' DWORD* out
) As Boolean
End Function

' hPrinter : PRINTER_HANDLE
' pEnvironment : LPCWSTR optional
' Level : DWORD
' pDriverInfo : BYTE* optional, out
' cbBuf : DWORD
' pcbNeeded : DWORD* out
Declare PtrSafe Function GetPrinterDriverW Lib "winspool.drv" ( _
    ByVal hPrinter As LongPtr, _
    ByVal pEnvironment As LongPtr, _
    ByVal Level As Long, _
    ByVal pDriverInfo As LongPtr, _
    ByVal cbBuf As Long, _
    ByRef pcbNeeded 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

GetPrinterDriverW = ctypes.windll.LoadLibrary("winspool.drv").GetPrinterDriverW
GetPrinterDriverW.restype = wintypes.BOOL
GetPrinterDriverW.argtypes = [
    PRINTER_HANDLE,  # hPrinter : PRINTER_HANDLE
    wintypes.LPCWSTR,  # pEnvironment : LPCWSTR optional
    wintypes.DWORD,  # Level : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pDriverInfo : BYTE* optional, out
    wintypes.DWORD,  # cbBuf : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pcbNeeded : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
GetPrinterDriverW = Fiddle::Function.new(
  lib['GetPrinterDriverW'],
  [
    Fiddle::TYPE_VOIDP,  # hPrinter : PRINTER_HANDLE
    Fiddle::TYPE_VOIDP,  # pEnvironment : LPCWSTR optional
    -Fiddle::TYPE_INT,  # Level : DWORD
    Fiddle::TYPE_VOIDP,  # pDriverInfo : BYTE* optional, out
    -Fiddle::TYPE_INT,  # cbBuf : DWORD
    Fiddle::TYPE_VOIDP,  # pcbNeeded : DWORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winspool.drv")]
extern "system" {
    fn GetPrinterDriverW(
        hPrinter: PRINTER_HANDLE,  // PRINTER_HANDLE
        pEnvironment: *const u16,  // LPCWSTR optional
        Level: u32,  // DWORD
        pDriverInfo: *mut u8,  // BYTE* optional, out
        cbBuf: u32,  // DWORD
        pcbNeeded: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("winspool.drv", CharSet = CharSet.Unicode)]
public static extern bool GetPrinterDriverW(PRINTER_HANDLE hPrinter, [MarshalAs(UnmanagedType.LPWStr)] string pEnvironment, uint Level, IntPtr pDriverInfo, uint cbBuf, out uint pcbNeeded);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_GetPrinterDriverW' -Namespace Win32 -PassThru
# $api::GetPrinterDriverW(hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)

#uselib "winspool.drv"
#func global GetPrinterDriverW "GetPrinterDriverW" wptr, wptr, wptr, wptr, wptr, wptr
; GetPrinterDriverW hPrinter, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded)   ; 戻り値は stat
; hPrinter : PRINTER_HANDLE -> "wptr"
; pEnvironment : LPCWSTR optional -> "wptr"
; Level : DWORD -> "wptr"
; pDriverInfo : BYTE* optional, out -> "wptr"
; cbBuf : DWORD -> "wptr"
; pcbNeeded : DWORD* out -> "wptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 "winspool.drv"
#cfunc global GetPrinterDriverW "GetPrinterDriverW" int, wstr, int, var, int, var
; res = GetPrinterDriverW(hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
; hPrinter : PRINTER_HANDLE -> "int"
; pEnvironment : LPCWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "var"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "var"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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。

; BOOL GetPrinterDriverW(PRINTER_HANDLE hPrinter, LPCWSTR pEnvironment, DWORD Level, BYTE* pDriverInfo, DWORD cbBuf, DWORD* pcbNeeded)
#uselib "winspool.drv"
#cfunc global GetPrinterDriverW "GetPrinterDriverW" int, wstr, int, var, int, var
; res = GetPrinterDriverW(hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
; hPrinter : PRINTER_HANDLE -> "int"
; pEnvironment : LPCWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "var"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "var"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 (
	winspool_drv = windows.NewLazySystemDLL("winspool.drv")
	procGetPrinterDriverW = winspool_drv.NewProc("GetPrinterDriverW")
)

// hPrinter (PRINTER_HANDLE), pEnvironment (LPCWSTR optional), Level (DWORD), pDriverInfo (BYTE* optional, out), cbBuf (DWORD), pcbNeeded (DWORD* out)
r1, _, err := procGetPrinterDriverW.Call(
	uintptr(hPrinter),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pEnvironment))),
	uintptr(Level),
	uintptr(pDriverInfo),
	uintptr(cbBuf),
	uintptr(pcbNeeded),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetPrinterDriverW(
  hPrinter: PRINTER_HANDLE;   // PRINTER_HANDLE
  pEnvironment: PWideChar;   // LPCWSTR optional
  Level: DWORD;   // DWORD
  pDriverInfo: Pointer;   // BYTE* optional, out
  cbBuf: DWORD;   // DWORD
  pcbNeeded: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'winspool.drv' name 'GetPrinterDriverW';

result := DllCall("winspool.drv\GetPrinterDriverW"
    , "Ptr", hPrinter   ; PRINTER_HANDLE
    , "WStr", pEnvironment   ; LPCWSTR optional
    , "UInt", Level   ; DWORD
    , "Ptr", pDriverInfo   ; BYTE* optional, out
    , "UInt", cbBuf   ; DWORD
    , "Ptr", pcbNeeded   ; DWORD* out
    , "Int")   ; return: BOOL

●GetPrinterDriverW(hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded) = DLL("winspool.drv", "bool GetPrinterDriverW(void*, char*, dword, void*, dword, void*)")
# 呼び出し: GetPrinterDriverW(hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
# hPrinter : PRINTER_HANDLE -> "void*"
# pEnvironment : LPCWSTR optional -> "char*"
# Level : DWORD -> "dword"
# pDriverInfo : BYTE* optional, out -> "void*"
# cbBuf : DWORD -> "dword"
# pcbNeeded : DWORD* out -> "void*"
# 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。