GetCorePrinterDriversA

// winspool.drv  (ANSI / -A)
#include <windows.h>

HRESULT GetCorePrinterDriversA(
    LPCSTR pszServer,   // optional
    LPCSTR pszEnvironment,   // optional
    LPCSTR pszzCoreDriverDependencies,
    DWORD cCorePrinterDrivers,
    CORE_PRINTER_DRIVERA* pCorePrinterDrivers
);

<DllImport("winspool.drv", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetCorePrinterDriversA(
    <MarshalAs(UnmanagedType.LPStr)> pszServer As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> pszEnvironment As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> pszzCoreDriverDependencies As String,   ' LPCSTR
    cCorePrinterDrivers As UInteger,   ' DWORD
    pCorePrinterDrivers As IntPtr   ' CORE_PRINTER_DRIVERA* out
) As Integer
End Function

' pszServer : LPCSTR optional
' pszEnvironment : LPCSTR optional
' pszzCoreDriverDependencies : LPCSTR
' cCorePrinterDrivers : DWORD
' pCorePrinterDrivers : CORE_PRINTER_DRIVERA* out
Declare PtrSafe Function GetCorePrinterDriversA Lib "winspool.drv" ( _
    ByVal pszServer As String, _
    ByVal pszEnvironment As String, _
    ByVal pszzCoreDriverDependencies As String, _
    ByVal cCorePrinterDrivers As Long, _
    ByVal pCorePrinterDrivers As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

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

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
GetCorePrinterDriversA = Fiddle::Function.new(
  lib['GetCorePrinterDriversA'],
  [
    Fiddle::TYPE_VOIDP,  # pszServer : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # pszEnvironment : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # pszzCoreDriverDependencies : LPCSTR
    -Fiddle::TYPE_INT,  # cCorePrinterDrivers : DWORD
    Fiddle::TYPE_VOIDP,  # pCorePrinterDrivers : CORE_PRINTER_DRIVERA* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winspool.drv")]
extern "system" {
    fn GetCorePrinterDriversA(
        pszServer: *const u8,  // LPCSTR optional
        pszEnvironment: *const u8,  // LPCSTR optional
        pszzCoreDriverDependencies: *const u8,  // LPCSTR
        cCorePrinterDrivers: u32,  // DWORD
        pCorePrinterDrivers: *mut CORE_PRINTER_DRIVERA  // CORE_PRINTER_DRIVERA* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "winspool.drv"
#func global GetCorePrinterDriversA "GetCorePrinterDriversA" sptr, sptr, sptr, sptr, sptr
; GetCorePrinterDriversA pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, varptr(pCorePrinterDrivers)   ; 戻り値は stat
; pszServer : LPCSTR optional -> "sptr"
; pszEnvironment : LPCSTR optional -> "sptr"
; pszzCoreDriverDependencies : LPCSTR -> "sptr"
; cCorePrinterDrivers : DWORD -> "sptr"
; pCorePrinterDrivers : CORE_PRINTER_DRIVERA* out -> "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 "winspool.drv"
#cfunc global GetCorePrinterDriversA "GetCorePrinterDriversA" str, str, str, int, var
; res = GetCorePrinterDriversA(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers)
; pszServer : LPCSTR optional -> "str"
; pszEnvironment : LPCSTR optional -> "str"
; pszzCoreDriverDependencies : LPCSTR -> "str"
; cCorePrinterDrivers : DWORD -> "int"
; pCorePrinterDrivers : CORE_PRINTER_DRIVERA* 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 GetCorePrinterDriversA(LPCSTR pszServer, LPCSTR pszEnvironment, LPCSTR pszzCoreDriverDependencies, DWORD cCorePrinterDrivers, CORE_PRINTER_DRIVERA* pCorePrinterDrivers)
#uselib "winspool.drv"
#cfunc global GetCorePrinterDriversA "GetCorePrinterDriversA" str, str, str, int, var
; res = GetCorePrinterDriversA(pszServer, pszEnvironment, pszzCoreDriverDependencies, cCorePrinterDrivers, pCorePrinterDrivers)
; pszServer : LPCSTR optional -> "str"
; pszEnvironment : LPCSTR optional -> "str"
; pszzCoreDriverDependencies : LPCSTR -> "str"
; cCorePrinterDrivers : DWORD -> "int"
; pCorePrinterDrivers : CORE_PRINTER_DRIVERA* 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")
	procGetCorePrinterDriversA = winspool_drv.NewProc("GetCorePrinterDriversA")
)

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

function GetCorePrinterDriversA(
  pszServer: PAnsiChar;   // LPCSTR optional
  pszEnvironment: PAnsiChar;   // LPCSTR optional
  pszzCoreDriverDependencies: PAnsiChar;   // LPCSTR
  cCorePrinterDrivers: DWORD;   // DWORD
  pCorePrinterDrivers: Pointer   // CORE_PRINTER_DRIVERA* out
): Integer; stdcall;
  external 'winspool.drv' name 'GetCorePrinterDriversA';

result := DllCall("winspool.drv\GetCorePrinterDriversA"
    , "AStr", pszServer   ; LPCSTR optional
    , "AStr", pszEnvironment   ; LPCSTR optional
    , "AStr", pszzCoreDriverDependencies   ; LPCSTR
    , "UInt", cCorePrinterDrivers   ; DWORD
    , "Ptr", pCorePrinterDrivers   ; CORE_PRINTER_DRIVERA* out
    , "Int")   ; return: HRESULT

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