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GetPrinterDriver2W

関数

親ウィンドウ指定でプリンタードライバー情報を取得する。

DLLwinspool.drv文字セットUnicode (-W)呼出規約winapi

シグネチャ

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

BOOL GetPrinterDriver2W(
    HWND hWnd,   // optional
    PRINTER_HANDLE hPrinter,
    LPWSTR pEnvironment,   // optional
    DWORD Level,
    BYTE* pDriverInfo,   // optional
    DWORD cbBuf,
    DWORD* pcbNeeded
);

パラメーター

名前	型	方向	説明
hWnd	HWND	inoptional	UI表示の親となるウィンドウハンドル。NULL可。
hPrinter	PRINTER_HANDLE	in	OpenPrinterで取得したプリンタハンドル。
pEnvironment	LPWSTR	inoptional	対象アーキテクチャ環境名(Unicode)。NULLで現在の環境。
Level	DWORD	in	pDriverInfoが指す構造体のバージョンレベル(1〜8など)。
pDriverInfo	BYTE*	outoptional	DRIVER_INFO_x構造体を受け取る出力バッファ。
cbBuf	DWORD	in	pDriverInfoバッファのサイズ(バイト単位)。
pcbNeeded	DWORD*	out	コピー済みまたは必要なバイト数を受け取るポインタ。

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetPrinterDriver2W(
    HWND hWnd,   // optional
    PRINTER_HANDLE hPrinter,
    LPWSTR pEnvironment,   // optional
    DWORD Level,
    BYTE* pDriverInfo,   // optional
    DWORD cbBuf,
    DWORD* pcbNeeded
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = true)]
static extern bool GetPrinterDriver2W(
    IntPtr hWnd,   // HWND optional
    PRINTER_HANDLE hPrinter,   // PRINTER_HANDLE
    [MarshalAs(UnmanagedType.LPWStr)] string pEnvironment,   // LPWSTR optional
    uint Level,   // DWORD
    IntPtr pDriverInfo,   // BYTE* optional, out
    uint cbBuf,   // DWORD
    out uint pcbNeeded   // DWORD* out
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetPrinterDriver2W(
    hWnd As IntPtr,   ' HWND optional
    hPrinter As PRINTER_HANDLE,   ' PRINTER_HANDLE
    <MarshalAs(UnmanagedType.LPWStr)> pEnvironment As String,   ' LPWSTR optional
    Level As UInteger,   ' DWORD
    pDriverInfo As IntPtr,   ' BYTE* optional, out
    cbBuf As UInteger,   ' DWORD
    <Out> ByRef pcbNeeded As UInteger   ' DWORD* out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' hWnd : HWND optional
' hPrinter : PRINTER_HANDLE
' pEnvironment : LPWSTR optional
' Level : DWORD
' pDriverInfo : BYTE* optional, out
' cbBuf : DWORD
' pcbNeeded : DWORD* out
Declare PtrSafe Function GetPrinterDriver2W Lib "winspool.drv" ( _
    ByVal hWnd As LongPtr, _
    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

GetPrinterDriver2W = ctypes.windll.LoadLibrary("winspool.drv").GetPrinterDriver2W
GetPrinterDriver2W.restype = wintypes.BOOL
GetPrinterDriver2W.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND optional
    PRINTER_HANDLE,  # hPrinter : PRINTER_HANDLE
    wintypes.LPCWSTR,  # pEnvironment : LPWSTR 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')
GetPrinterDriver2W = Fiddle::Function.new(
  lib['GetPrinterDriver2W'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND optional
    Fiddle::TYPE_VOIDP,  # hPrinter : PRINTER_HANDLE
    Fiddle::TYPE_VOIDP,  # pEnvironment : LPWSTR 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 GetPrinterDriver2W(
        hWnd: *mut core::ffi::c_void,  // HWND optional
        hPrinter: PRINTER_HANDLE,  // PRINTER_HANDLE
        pEnvironment: *mut u16,  // LPWSTR 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 GetPrinterDriver2W(IntPtr hWnd, 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_GetPrinterDriver2W' -Namespace Win32 -PassThru
# $api::GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)

#uselib "winspool.drv"
#func global GetPrinterDriver2W "GetPrinterDriver2W" wptr, wptr, wptr, wptr, wptr, wptr, wptr
; GetPrinterDriver2W hWnd, hPrinter, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded)   ; 戻り値は stat
; hWnd : HWND optional -> "wptr"
; hPrinter : PRINTER_HANDLE -> "wptr"
; pEnvironment : LPWSTR 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。

出力引数:

#uselib "winspool.drv"
#cfunc global GetPrinterDriver2W "GetPrinterDriver2W" sptr, int, wstr, int, var, int, var
; res = GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
; hWnd : HWND optional -> "sptr"
; hPrinter : PRINTER_HANDLE -> "int"
; pEnvironment : LPWSTR 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。#uselib "winspool.drv"
#cfunc global GetPrinterDriver2W "GetPrinterDriver2W" sptr, int, wstr, int, sptr, int, sptr
; res = GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded))
; hWnd : HWND optional -> "sptr"
; hPrinter : PRINTER_HANDLE -> "int"
; pEnvironment : LPWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "sptr"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "sptr"
; ※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/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; BOOL GetPrinterDriver2W(HWND hWnd, PRINTER_HANDLE hPrinter, LPWSTR pEnvironment, DWORD Level, BYTE* pDriverInfo, DWORD cbBuf, DWORD* pcbNeeded)
#uselib "winspool.drv"
#cfunc global GetPrinterDriver2W "GetPrinterDriver2W" intptr, int, wstr, int, var, int, var
; res = GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
; hWnd : HWND optional -> "intptr"
; hPrinter : PRINTER_HANDLE -> "int"
; pEnvironment : LPWSTR 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 GetPrinterDriver2W(HWND hWnd, PRINTER_HANDLE hPrinter, LPWSTR pEnvironment, DWORD Level, BYTE* pDriverInfo, DWORD cbBuf, DWORD* pcbNeeded)
#uselib "winspool.drv"
#cfunc global GetPrinterDriver2W "GetPrinterDriver2W" intptr, int, wstr, int, intptr, int, intptr
; res = GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded))
; hWnd : HWND optional -> "intptr"
; hPrinter : PRINTER_HANDLE -> "int"
; pEnvironment : LPWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "intptr"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "intptr"
; ※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/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	winspool_drv = windows.NewLazySystemDLL("winspool.drv")
	procGetPrinterDriver2W = winspool_drv.NewProc("GetPrinterDriver2W")
)

// hWnd (HWND optional), hPrinter (PRINTER_HANDLE), pEnvironment (LPWSTR optional), Level (DWORD), pDriverInfo (BYTE* optional, out), cbBuf (DWORD), pcbNeeded (DWORD* out)
r1, _, err := procGetPrinterDriver2W.Call(
	uintptr(hWnd),
	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 GetPrinterDriver2W(
  hWnd: THandle;   // HWND optional
  hPrinter: PRINTER_HANDLE;   // PRINTER_HANDLE
  pEnvironment: PWideChar;   // LPWSTR optional
  Level: DWORD;   // DWORD
  pDriverInfo: Pointer;   // BYTE* optional, out
  cbBuf: DWORD;   // DWORD
  pcbNeeded: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'winspool.drv' name 'GetPrinterDriver2W';

result := DllCall("winspool.drv\GetPrinterDriver2W"
    , "Ptr", hWnd   ; HWND optional
    , "Ptr", hPrinter   ; PRINTER_HANDLE
    , "WStr", pEnvironment   ; LPWSTR optional
    , "UInt", Level   ; DWORD
    , "Ptr", pDriverInfo   ; BYTE* optional, out
    , "UInt", cbBuf   ; DWORD
    , "Ptr", pcbNeeded   ; DWORD* out
    , "Int")   ; return: BOOL

●GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded) = DLL("winspool.drv", "bool GetPrinterDriver2W(void*, void*, char*, dword, void*, dword, void*)")
# 呼び出し: GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
# hWnd : HWND optional -> "void*"
# hPrinter : PRINTER_HANDLE -> "void*"
# pEnvironment : LPWSTR 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。

const std = @import("std");

extern "winspool.drv" fn GetPrinterDriver2W(
    hWnd: ?*anyopaque, // HWND optional
    hPrinter: PRINTER_HANDLE, // PRINTER_HANDLE
    pEnvironment: [*c]const u16, // LPWSTR optional
    Level: u32, // DWORD
    pDriverInfo: [*c]u8, // BYTE* optional, out
    cbBuf: u32, // DWORD
    pcbNeeded: [*c]u32 // DWORD* out
) callconv(std.os.windows.WINAPI) i32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc GetPrinterDriver2W(
    hWnd: pointer,  # HWND optional
    hPrinter: PRINTER_HANDLE,  # PRINTER_HANDLE
    pEnvironment: WideCString,  # LPWSTR optional
    Level: uint32,  # DWORD
    pDriverInfo: ptr uint8,  # BYTE* optional, out
    cbBuf: uint32,  # DWORD
    pcbNeeded: ptr uint32  # DWORD* out
): int32 {.importc: "GetPrinterDriver2W", stdcall, dynlib: "winspool.drv".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "winspool.drv");
extern(Windows)
int GetPrinterDriver2W(
    void* hWnd,   // HWND optional
    PRINTER_HANDLE hPrinter,   // PRINTER_HANDLE
    const(wchar)* pEnvironment,   // LPWSTR optional
    uint Level,   // DWORD
    ubyte* pDriverInfo,   // BYTE* optional, out
    uint cbBuf,   // DWORD
    uint* pcbNeeded   // DWORD* out
);

ccall((:GetPrinterDriver2W, "winspool.drv"), stdcall, Int32,
      (Ptr{Cvoid}, PRINTER_HANDLE, Cwstring, UInt32, Ptr{UInt8}, UInt32, Ptr{UInt32}),
      hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
# hWnd : HWND optional -> Ptr{Cvoid}
# hPrinter : PRINTER_HANDLE -> PRINTER_HANDLE
# pEnvironment : LPWSTR optional -> Cwstring
# Level : DWORD -> UInt32
# pDriverInfo : BYTE* optional, out -> Ptr{UInt8}
# cbBuf : DWORD -> UInt32
# pcbNeeded : DWORD* out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
# Unicode(-W): Cwstring には transcode(UInt16, "...") 等で UTF-16 を渡す。

local ffi = require("ffi")
ffi.cdef[[
int32_t GetPrinterDriver2W(
    void* hWnd,
    PRINTER_HANDLE hPrinter,
    const uint16_t* pEnvironment,
    uint32_t Level,
    uint8_t* pDriverInfo,
    uint32_t cbBuf,
    uint32_t* pcbNeeded);
]]
local winspool.drv = ffi.load("winspool.drv")
-- winspool.drv.GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
-- hWnd : HWND optional
-- hPrinter : PRINTER_HANDLE
-- pEnvironment : LPWSTR optional
-- Level : DWORD
-- pDriverInfo : BYTE* optional, out
-- cbBuf : DWORD
-- pcbNeeded : DWORD* out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
-- Unicode(-W): uint16_t* には UTF-16LE のバッファ(ffi.new("uint16_t[?]", ...))を渡す。

const koffi = require('koffi');
const lib = koffi.load('winspool.drv');
const GetPrinterDriver2W = lib.func('__stdcall', 'GetPrinterDriver2W', 'int32_t', ['void *', 'PRINTER_HANDLE', 'str16', 'uint32_t', 'uint8_t *', 'uint32_t', 'uint32_t *']);
// GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
// hWnd : HWND optional -> 'void *'
// hPrinter : PRINTER_HANDLE -> 'PRINTER_HANDLE'
// pEnvironment : LPWSTR optional -> 'str16'
// Level : DWORD -> 'uint32_t'
// pDriverInfo : BYTE* optional, out -> 'uint8_t *'
// cbBuf : DWORD -> 'uint32_t'
// pcbNeeded : DWORD* out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("winspool.drv", {
  GetPrinterDriver2W: { parameters: ["pointer", "buffer", "buffer", "u32", "pointer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded)
// hWnd : HWND optional -> "pointer"
// hPrinter : PRINTER_HANDLE -> "buffer"
// pEnvironment : LPWSTR optional -> "buffer"
// Level : DWORD -> "u32"
// pDriverInfo : BYTE* optional, out -> "pointer"
// cbBuf : DWORD -> "u32"
// pcbNeeded : DWORD* out -> "pointer"
// 文字列は "buffer"。Unicode(-W) は new TextEncoder() ではなく UTF-16LE のバイト列(末尾に \x00\x00)を Uint8Array で渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t GetPrinterDriver2W(
    void* hWnd,
    PRINTER_HANDLE hPrinter,
    const uint16_t* pEnvironment,
    uint32_t Level,
    uint8_t* pDriverInfo,
    uint32_t cbBuf,
    uint32_t* pcbNeeded);
C, "winspool.drv");
// $ffi->GetPrinterDriver2W(hWnd, hPrinter, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded);
// hWnd : HWND optional
// hPrinter : PRINTER_HANDLE
// pEnvironment : LPWSTR optional
// Level : DWORD
// pDriverInfo : BYTE* optional, out
// cbBuf : DWORD
// pcbNeeded : DWORD* out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Winspool.drv extends StdCallLibrary {
    Winspool.drv INSTANCE = Native.load("winspool.drv", Winspool.drv.class, W32APIOptions.UNICODE_OPTIONS);
    boolean GetPrinterDriver2W(
        Pointer hWnd,   // HWND optional
        PRINTER_HANDLE /* extends Structure (by value) */ hPrinter,   // PRINTER_HANDLE
        WString pEnvironment,   // LPWSTR optional
        int Level,   // DWORD
        byte[] pDriverInfo,   // BYTE* optional, out
        int cbBuf,   // DWORD
        IntByReference pcbNeeded   // DWORD* out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("winspool.drv")]
lib Libwinspool.drv
  fun GetPrinterDriver2W = GetPrinterDriver2W(
    hWnd : Void*,   # HWND optional
    hPrinter : PRINTER_HANDLE,   # PRINTER_HANDLE
    pEnvironment : UInt16*,   # LPWSTR optional
    Level : UInt32,   # DWORD
    pDriverInfo : UInt8*,   # BYTE* optional, out
    cbBuf : UInt32,   # DWORD
    pcbNeeded : UInt32*   # DWORD* out
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef GetPrinterDriver2WNative = Int32 Function(Pointer<Void>, PRINTER_HANDLE, Pointer<Utf16>, Uint32, Pointer<Uint8>, Uint32, Pointer<Uint32>);
typedef GetPrinterDriver2WDart = int Function(Pointer<Void>, int, Pointer<Utf16>, int, Pointer<Uint8>, int, Pointer<Uint32>);
final GetPrinterDriver2W = DynamicLibrary.open('winspool.drv')
    .lookupFunction<GetPrinterDriver2WNative, GetPrinterDriver2WDart>('GetPrinterDriver2W');
// hWnd : HWND optional -> Pointer<Void>
// hPrinter : PRINTER_HANDLE -> PRINTER_HANDLE
// pEnvironment : LPWSTR optional -> Pointer<Utf16>
// Level : DWORD -> Uint32
// pDriverInfo : BYTE* optional, out -> Pointer<Uint8>
// cbBuf : DWORD -> Uint32
// pcbNeeded : DWORD* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetPrinterDriver2W(
  hWnd: THandle;   // HWND optional
  hPrinter: PRINTER_HANDLE;   // PRINTER_HANDLE
  pEnvironment: PWideChar;   // LPWSTR optional
  Level: DWORD;   // DWORD
  pDriverInfo: Pointer;   // BYTE* optional, out
  cbBuf: DWORD;   // DWORD
  pcbNeeded: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'winspool.drv' name 'GetPrinterDriver2W';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "GetPrinterDriver2W"
  c_GetPrinterDriver2W :: Ptr () -> PRINTER_HANDLE -> CWString -> Word32 -> Ptr Word8 -> Word32 -> Ptr Word32 -> IO CInt
-- hWnd : HWND optional -> Ptr ()
-- hPrinter : PRINTER_HANDLE -> PRINTER_HANDLE
-- pEnvironment : LPWSTR optional -> CWString
-- Level : DWORD -> Word32
-- pDriverInfo : BYTE* optional, out -> Ptr Word8
-- cbBuf : DWORD -> Word32
-- pcbNeeded : DWORD* out -> Ptr Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let getprinterdriver2w =
  foreign "GetPrinterDriver2W"
    ((ptr void) @-> PRINTER_HANDLE @-> (ptr uint16_t) @-> uint32_t @-> (ptr uint8_t) @-> uint32_t @-> (ptr uint32_t) @-> returning int32_t)
(* hWnd : HWND optional -> (ptr void) *)
(* hPrinter : PRINTER_HANDLE -> PRINTER_HANDLE *)
(* pEnvironment : LPWSTR optional -> (ptr uint16_t) *)
(* Level : DWORD -> uint32_t *)
(* pDriverInfo : BYTE* optional, out -> (ptr uint8_t) *)
(* cbBuf : DWORD -> uint32_t *)
(* pcbNeeded : DWORD* out -> (ptr uint32_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library winspool.drv (t "winspool.drv"))
(cffi:use-foreign-library winspool.drv)

(cffi:defcfun ("GetPrinterDriver2W" get-printer-driver2-w :convention :stdcall) :int32
  (h-wnd :pointer)   ; HWND optional
  (h-printer (:struct printer-handle))   ; PRINTER_HANDLE
  (p-environment (:string :encoding :utf-16le))   ; LPWSTR optional
  (level :uint32)   ; DWORD
  (p-driver-info :pointer)   ; BYTE* optional, out
  (cb-buf :uint32)   ; DWORD
  (pcb-needed :pointer))   ; DWORD* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetPrinterDriver2W = Win32::API::More->new('winspool.drv',
    'BOOL GetPrinterDriver2W(HANDLE hWnd, LPVOID hPrinter, LPCWSTR pEnvironment, DWORD Level, LPVOID pDriverInfo, DWORD cbBuf, LPVOID pcbNeeded)');
# my $ret = $GetPrinterDriver2W->Call($hWnd, $hPrinter, $pEnvironment, $Level, $pDriverInfo, $cbBuf, $pcbNeeded);
# hWnd : HWND optional -> HANDLE
# hPrinter : PRINTER_HANDLE -> LPVOID
# pEnvironment : LPWSTR optional -> LPCWSTR
# Level : DWORD -> DWORD
# pDriverInfo : BYTE* optional, out -> LPVOID
# cbBuf : DWORD -> DWORD
# pcbNeeded : DWORD* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。

GetPrinterDriver2W

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