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GetDefaultPrinterA

関数

既定のプリンター名を取得する。

DLLwinspool.drv文字セットANSI (-A)呼出規約winapi

シグネチャ

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

BOOL GetDefaultPrinterA(
    LPSTR pszBuffer,   // optional
    DWORD* pcchBuffer
);

パラメーター

名前	型	方向
pszBuffer	LPSTR	outoptional
pcchBuffer	DWORD*	inout

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetDefaultPrinterA(
    LPSTR pszBuffer,   // optional
    DWORD* pcchBuffer
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("winspool.drv", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern bool GetDefaultPrinterA(
    [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder pszBuffer,   // LPSTR optional, out
    ref uint pcchBuffer   // DWORD* in/out
);

<DllImport("winspool.drv", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetDefaultPrinterA(
    <MarshalAs(UnmanagedType.LPStr)> pszBuffer As System.Text.StringBuilder,   ' LPSTR optional, out
    ByRef pcchBuffer As UInteger   ' DWORD* in/out
) As Boolean
End Function

' pszBuffer : LPSTR optional, out
' pcchBuffer : DWORD* in/out
Declare PtrSafe Function GetDefaultPrinterA Lib "winspool.drv" ( _
    ByVal pszBuffer As String, _
    ByRef pcchBuffer As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetDefaultPrinterA = ctypes.windll.LoadLibrary("winspool.drv").GetDefaultPrinterA
GetDefaultPrinterA.restype = wintypes.BOOL
GetDefaultPrinterA.argtypes = [
    wintypes.LPSTR,  # pszBuffer : LPSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchBuffer : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
GetDefaultPrinterA = Fiddle::Function.new(
  lib['GetDefaultPrinterA'],
  [
    Fiddle::TYPE_VOIDP,  # pszBuffer : LPSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchBuffer : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winspool.drv")]
extern "system" {
    fn GetDefaultPrinterA(
        pszBuffer: *mut u8,  // LPSTR optional, out
        pcchBuffer: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("winspool.drv", CharSet = CharSet.Ansi)]
public static extern bool GetDefaultPrinterA([MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder pszBuffer, ref uint pcchBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_GetDefaultPrinterA' -Namespace Win32 -PassThru
# $api::GetDefaultPrinterA(pszBuffer, pcchBuffer)

#uselib "winspool.drv"
#func global GetDefaultPrinterA "GetDefaultPrinterA" sptr, sptr
; GetDefaultPrinterA varptr(pszBuffer), varptr(pcchBuffer)   ; 戻り値は stat
; pszBuffer : LPSTR optional, out -> "sptr"
; pcchBuffer : DWORD* in/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。

出力引数:

#uselib "winspool.drv"
#cfunc global GetDefaultPrinterA "GetDefaultPrinterA" var, var
; res = GetDefaultPrinterA(pszBuffer, pcchBuffer)
; pszBuffer : LPSTR optional, out -> "var"
; pcchBuffer : DWORD* in/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 GetDefaultPrinterA "GetDefaultPrinterA" sptr, sptr
; res = GetDefaultPrinterA(varptr(pszBuffer), varptr(pcchBuffer))
; pszBuffer : LPSTR optional, out -> "sptr"
; pcchBuffer : DWORD* in/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 GetDefaultPrinterA(LPSTR pszBuffer, DWORD* pcchBuffer)
#uselib "winspool.drv"
#cfunc global GetDefaultPrinterA "GetDefaultPrinterA" var, var
; res = GetDefaultPrinterA(pszBuffer, pcchBuffer)
; pszBuffer : LPSTR optional, out -> "var"
; pcchBuffer : DWORD* in/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 GetDefaultPrinterA(LPSTR pszBuffer, DWORD* pcchBuffer)
#uselib "winspool.drv"
#cfunc global GetDefaultPrinterA "GetDefaultPrinterA" intptr, intptr
; res = GetDefaultPrinterA(varptr(pszBuffer), varptr(pcchBuffer))
; pszBuffer : LPSTR optional, out -> "intptr"
; pcchBuffer : DWORD* in/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")
	procGetDefaultPrinterA = winspool_drv.NewProc("GetDefaultPrinterA")
)

// pszBuffer (LPSTR optional, out), pcchBuffer (DWORD* in/out)
r1, _, err := procGetDefaultPrinterA.Call(
	uintptr(pszBuffer),
	uintptr(pcchBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetDefaultPrinterA(
  pszBuffer: PAnsiChar;   // LPSTR optional, out
  pcchBuffer: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'winspool.drv' name 'GetDefaultPrinterA';

result := DllCall("winspool.drv\GetDefaultPrinterA"
    , "Ptr", pszBuffer   ; LPSTR optional, out
    , "Ptr", pcchBuffer   ; DWORD* in/out
    , "Int")   ; return: BOOL

●GetDefaultPrinterA(pszBuffer, pcchBuffer) = DLL("winspool.drv", "bool GetDefaultPrinterA(char*, void*)")
# 呼び出し: GetDefaultPrinterA(pszBuffer, pcchBuffer)
# pszBuffer : LPSTR optional, out -> "char*"
# pcchBuffer : DWORD* in/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)。