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EnumPrinterDriversW

関数

インストール済みのプリンタドライバを列挙する(Unicode版)。

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

シグネチャ

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

BOOL EnumPrinterDriversW(
    LPCWSTR pName,   // optional
    LPCWSTR pEnvironment,   // optional
    DWORD Level,
    BYTE* pDriverInfo,   // optional
    DWORD cbBuf,
    DWORD* pcbNeeded,
    DWORD* pcReturned
);

パラメーター

名前	型	方向
pName	LPCWSTR	inoptional
pEnvironment	LPCWSTR	inoptional
Level	DWORD	in
pDriverInfo	BYTE*	outoptional
cbBuf	DWORD	in
pcbNeeded	DWORD*	out
pcReturned	DWORD*	out

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 EnumPrinterDriversW(
    LPCWSTR pName,   // optional
    LPCWSTR pEnvironment,   // optional
    DWORD Level,
    BYTE* pDriverInfo,   // optional
    DWORD cbBuf,
    DWORD* pcbNeeded,
    DWORD* pcReturned
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("winspool.drv", CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]
static extern bool EnumPrinterDriversW(
    [MarshalAs(UnmanagedType.LPWStr)] string pName,   // LPCWSTR optional
    [MarshalAs(UnmanagedType.LPWStr)] string pEnvironment,   // LPCWSTR optional
    uint Level,   // DWORD
    IntPtr pDriverInfo,   // BYTE* optional, out
    uint cbBuf,   // DWORD
    out uint pcbNeeded,   // DWORD* out
    out uint pcReturned   // DWORD* out
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function EnumPrinterDriversW(
    <MarshalAs(UnmanagedType.LPWStr)> pName As String,   ' LPCWSTR optional
    <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
    <Out> ByRef pcReturned As UInteger   ' DWORD* out
) As Boolean
End Function

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

EnumPrinterDriversW = ctypes.windll.LoadLibrary("winspool.drv").EnumPrinterDriversW
EnumPrinterDriversW.restype = wintypes.BOOL
EnumPrinterDriversW.argtypes = [
    wintypes.LPCWSTR,  # pName : LPCWSTR optional
    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
    ctypes.POINTER(wintypes.DWORD),  # pcReturned : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
EnumPrinterDriversW = Fiddle::Function.new(
  lib['EnumPrinterDriversW'],
  [
    Fiddle::TYPE_VOIDP,  # pName : LPCWSTR optional
    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_VOIDP,  # pcReturned : DWORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winspool.drv")]
extern "system" {
    fn EnumPrinterDriversW(
        pName: *const u16,  // LPCWSTR optional
        pEnvironment: *const u16,  // LPCWSTR optional
        Level: u32,  // DWORD
        pDriverInfo: *mut u8,  // BYTE* optional, out
        cbBuf: u32,  // DWORD
        pcbNeeded: *mut u32,  // DWORD* out
        pcReturned: *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, SetLastError = true)]
public static extern bool EnumPrinterDriversW([MarshalAs(UnmanagedType.LPWStr)] string pName, [MarshalAs(UnmanagedType.LPWStr)] string pEnvironment, uint Level, IntPtr pDriverInfo, uint cbBuf, out uint pcbNeeded, out uint pcReturned);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_EnumPrinterDriversW' -Namespace Win32 -PassThru
# $api::EnumPrinterDriversW(pName, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded, pcReturned)

#uselib "winspool.drv"
#func global EnumPrinterDriversW "EnumPrinterDriversW" wptr, wptr, wptr, wptr, wptr, wptr, wptr
; EnumPrinterDriversW pName, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded), varptr(pcReturned)   ; 戻り値は stat
; pName : LPCWSTR optional -> "wptr"
; pEnvironment : LPCWSTR optional -> "wptr"
; Level : DWORD -> "wptr"
; pDriverInfo : BYTE* optional, out -> "wptr"
; cbBuf : DWORD -> "wptr"
; pcbNeeded : DWORD* out -> "wptr"
; pcReturned : DWORD* 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。

出力引数:

#uselib "winspool.drv"
#cfunc global EnumPrinterDriversW "EnumPrinterDriversW" wstr, wstr, int, var, int, var, var
; res = EnumPrinterDriversW(pName, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded, pcReturned)
; pName : LPCWSTR optional -> "wstr"
; pEnvironment : LPCWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "var"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "var"
; pcReturned : DWORD* 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。#uselib "winspool.drv"
#cfunc global EnumPrinterDriversW "EnumPrinterDriversW" wstr, wstr, int, sptr, int, sptr, sptr
; res = EnumPrinterDriversW(pName, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded), varptr(pcReturned))
; pName : LPCWSTR optional -> "wstr"
; pEnvironment : LPCWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "sptr"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "sptr"
; pcReturned : DWORD* out -> "sptr"
; ※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 EnumPrinterDriversW(LPCWSTR pName, LPCWSTR pEnvironment, DWORD Level, BYTE* pDriverInfo, DWORD cbBuf, DWORD* pcbNeeded, DWORD* pcReturned)
#uselib "winspool.drv"
#cfunc global EnumPrinterDriversW "EnumPrinterDriversW" wstr, wstr, int, var, int, var, var
; res = EnumPrinterDriversW(pName, pEnvironment, Level, pDriverInfo, cbBuf, pcbNeeded, pcReturned)
; pName : LPCWSTR optional -> "wstr"
; pEnvironment : LPCWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "var"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "var"
; pcReturned : DWORD* 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。; BOOL EnumPrinterDriversW(LPCWSTR pName, LPCWSTR pEnvironment, DWORD Level, BYTE* pDriverInfo, DWORD cbBuf, DWORD* pcbNeeded, DWORD* pcReturned)
#uselib "winspool.drv"
#cfunc global EnumPrinterDriversW "EnumPrinterDriversW" wstr, wstr, int, intptr, int, intptr, intptr
; res = EnumPrinterDriversW(pName, pEnvironment, Level, varptr(pDriverInfo), cbBuf, varptr(pcbNeeded), varptr(pcReturned))
; pName : LPCWSTR optional -> "wstr"
; pEnvironment : LPCWSTR optional -> "wstr"
; Level : DWORD -> "int"
; pDriverInfo : BYTE* optional, out -> "intptr"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "intptr"
; pcReturned : DWORD* out -> "intptr"
; ※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")
	procEnumPrinterDriversW = winspool_drv.NewProc("EnumPrinterDriversW")
)

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

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

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

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