GetCorePrinterDriversW

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

HRESULT GetCorePrinterDriversW(
    LPCWSTR pszServer,   // optional
    LPCWSTR pszEnvironment,   // optional
    LPCWSTR pszzCoreDriverDependencies,
    DWORD cCorePrinterDrivers,
    CORE_PRINTER_DRIVERW* pCorePrinterDrivers
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetCorePrinterDriversW(
    <MarshalAs(UnmanagedType.LPWStr)> pszServer As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pszEnvironment As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pszzCoreDriverDependencies As String,   ' LPCWSTR
    cCorePrinterDrivers As UInteger,   ' DWORD
    pCorePrinterDrivers As IntPtr   ' CORE_PRINTER_DRIVERW* out
) As Integer
End Function

' pszServer : LPCWSTR optional
' pszEnvironment : LPCWSTR optional
' pszzCoreDriverDependencies : LPCWSTR
' cCorePrinterDrivers : DWORD
' pCorePrinterDrivers : CORE_PRINTER_DRIVERW* out
Declare PtrSafe Function GetCorePrinterDriversW Lib "winspool.drv" ( _
    ByVal pszServer As LongPtr, _
    ByVal pszEnvironment As LongPtr, _
    ByVal pszzCoreDriverDependencies As LongPtr, _
    ByVal cCorePrinterDrivers As Long, _
    ByVal pCorePrinterDrivers As LongPtr) 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

GetCorePrinterDriversW = ctypes.windll.LoadLibrary("winspool.drv").GetCorePrinterDriversW
GetCorePrinterDriversW.restype = ctypes.c_int
GetCorePrinterDriversW.argtypes = [
    wintypes.LPCWSTR,  # pszServer : LPCWSTR optional
    wintypes.LPCWSTR,  # pszEnvironment : LPCWSTR optional
    wintypes.LPCWSTR,  # pszzCoreDriverDependencies : LPCWSTR
    wintypes.DWORD,  # cCorePrinterDrivers : DWORD
    ctypes.c_void_p,  # pCorePrinterDrivers : CORE_PRINTER_DRIVERW* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
GetCorePrinterDriversW = Fiddle::Function.new(
  lib['GetCorePrinterDriversW'],
  [
    Fiddle::TYPE_VOIDP,  # pszServer : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pszEnvironment : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pszzCoreDriverDependencies : LPCWSTR
    -Fiddle::TYPE_INT,  # cCorePrinterDrivers : DWORD
    Fiddle::TYPE_VOIDP,  # pCorePrinterDrivers : CORE_PRINTER_DRIVERW* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winspool.drv")]
extern "system" {
    fn GetCorePrinterDriversW(
        pszServer: *const u16,  // LPCWSTR optional
        pszEnvironment: *const u16,  // LPCWSTR optional
        pszzCoreDriverDependencies: *const u16,  // LPCWSTR
        cCorePrinterDrivers: u32,  // DWORD
        pCorePrinterDrivers: *mut CORE_PRINTER_DRIVERW  // CORE_PRINTER_DRIVERW* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("winspool.drv", CharSet = CharSet.Unicode)]
public static extern int GetCorePrinterDriversW([MarshalAs(UnmanagedType.LPWStr)] string pszServer, [MarshalAs(UnmanagedType.LPWStr)] string pszEnvironment, [MarshalAs(UnmanagedType.LPWStr)] string pszzCoreDriverDependencies, uint cCorePrinterDrivers, IntPtr pCorePrinterDrivers);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_GetCorePrinterDriversW' -Namespace Win32 -PassThru
# $api::GetCorePrinterDriversW(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers)

#uselib "winspool.drv"
#func global GetCorePrinterDriversW "GetCorePrinterDriversW" wptr, wptr, wptr, wptr, wptr
; GetCorePrinterDriversW pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, varptr(pCorePrinterDrivers)   ; 戻り値は stat
; pszServer : LPCWSTR optional -> "wptr"
; pszEnvironment : LPCWSTR optional -> "wptr"
; pszzCoreDriverDependencies : LPCWSTR -> "wptr"
; cCorePrinterDrivers : DWORD -> "wptr"
; pCorePrinterDrivers : CORE_PRINTER_DRIVERW* out -> "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 "winspool.drv"
#cfunc global GetCorePrinterDriversW "GetCorePrinterDriversW" wstr, wstr, wstr, int, var
; res = GetCorePrinterDriversW(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers)
; pszServer : LPCWSTR optional -> "wstr"
; pszEnvironment : LPCWSTR optional -> "wstr"
; pszzCoreDriverDependencies : LPCWSTR -> "wstr"
; cCorePrinterDrivers : DWORD -> "int"
; pCorePrinterDrivers : CORE_PRINTER_DRIVERW* out -> "var"
; ※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。

; HRESULT GetCorePrinterDriversW(LPCWSTR pszServer, LPCWSTR pszEnvironment, LPCWSTR pszzCoreDriverDependencies, DWORD cCorePrinterDrivers, CORE_PRINTER_DRIVERW* pCorePrinterDrivers)
#uselib "winspool.drv"
#cfunc global GetCorePrinterDriversW "GetCorePrinterDriversW" wstr, wstr, wstr, int, var
; res = GetCorePrinterDriversW(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers)
; pszServer : LPCWSTR optional -> "wstr"
; pszEnvironment : LPCWSTR optional -> "wstr"
; pszzCoreDriverDependencies : LPCWSTR -> "wstr"
; cCorePrinterDrivers : DWORD -> "int"
; pCorePrinterDrivers : CORE_PRINTER_DRIVERW* out -> "var"
; ※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")
	procGetCorePrinterDriversW = winspool_drv.NewProc("GetCorePrinterDriversW")
)

// pszServer (LPCWSTR optional), pszEnvironment (LPCWSTR optional), pszzCoreDriverDependencies (LPCWSTR), cCorePrinterDrivers (DWORD), pCorePrinterDrivers (CORE_PRINTER_DRIVERW* out)
r1, _, err := procGetCorePrinterDriversW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszServer))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszEnvironment))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszzCoreDriverDependencies))),
	uintptr(cCorePrinterDrivers),
	uintptr(pCorePrinterDrivers),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function GetCorePrinterDriversW(
  pszServer: PWideChar;   // LPCWSTR optional
  pszEnvironment: PWideChar;   // LPCWSTR optional
  pszzCoreDriverDependencies: PWideChar;   // LPCWSTR
  cCorePrinterDrivers: DWORD;   // DWORD
  pCorePrinterDrivers: Pointer   // CORE_PRINTER_DRIVERW* out
): Integer; stdcall;
  external 'winspool.drv' name 'GetCorePrinterDriversW';

result := DllCall("winspool.drv\GetCorePrinterDriversW"
    , "WStr", pszServer   ; LPCWSTR optional
    , "WStr", pszEnvironment   ; LPCWSTR optional
    , "WStr", pszzCoreDriverDependencies   ; LPCWSTR
    , "UInt", cCorePrinterDrivers   ; DWORD
    , "Ptr", pCorePrinterDrivers   ; CORE_PRINTER_DRIVERW* out
    , "Int")   ; return: HRESULT

●GetCorePrinterDriversW(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers) = DLL("winspool.drv", "int GetCorePrinterDriversW(char*, char*, char*, dword, void*)")
# 呼び出し: GetCorePrinterDriversW(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers)
# pszServer : LPCWSTR optional -> "char*"
# pszEnvironment : LPCWSTR optional -> "char*"
# pszzCoreDriverDependencies : LPCWSTR -> "char*"
# cCorePrinterDrivers : DWORD -> "dword"
# pCorePrinterDrivers : CORE_PRINTER_DRIVERW* 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。