OpenPrinterA

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

BOOL OpenPrinterA(
    LPCSTR pPrinterName,   // optional
    PRINTER_HANDLE* phPrinter,
    PRINTER_DEFAULTSA* pDefault   // optional
);

<DllImport("winspool.drv", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenPrinterA(
    <MarshalAs(UnmanagedType.LPStr)> pPrinterName As String,   ' LPCSTR optional
    phPrinter As IntPtr,   ' PRINTER_HANDLE* out
    pDefault As IntPtr   ' PRINTER_DEFAULTSA* optional
) As Boolean
End Function

' pPrinterName : LPCSTR optional
' phPrinter : PRINTER_HANDLE* out
' pDefault : PRINTER_DEFAULTSA* optional
Declare PtrSafe Function OpenPrinterA Lib "winspool.drv" ( _
    ByVal pPrinterName As String, _
    ByVal phPrinter As LongPtr, _
    ByVal pDefault 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

OpenPrinterA = ctypes.windll.LoadLibrary("winspool.drv").OpenPrinterA
OpenPrinterA.restype = wintypes.BOOL
OpenPrinterA.argtypes = [
    wintypes.LPCSTR,  # pPrinterName : LPCSTR optional
    ctypes.c_void_p,  # phPrinter : PRINTER_HANDLE* out
    ctypes.c_void_p,  # pDefault : PRINTER_DEFAULTSA* optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
OpenPrinterA = Fiddle::Function.new(
  lib['OpenPrinterA'],
  [
    Fiddle::TYPE_VOIDP,  # pPrinterName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # phPrinter : PRINTER_HANDLE* out
    Fiddle::TYPE_VOIDP,  # pDefault : PRINTER_DEFAULTSA* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "winspool.drv")]
extern "system" {
    fn OpenPrinterA(
        pPrinterName: *const u8,  // LPCSTR optional
        phPrinter: *mut PRINTER_HANDLE,  // PRINTER_HANDLE* out
        pDefault: *mut PRINTER_DEFAULTSA  // PRINTER_DEFAULTSA* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("winspool.drv", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool OpenPrinterA([MarshalAs(UnmanagedType.LPStr)] string pPrinterName, IntPtr phPrinter, IntPtr pDefault);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_OpenPrinterA' -Namespace Win32 -PassThru
# $api::OpenPrinterA(pPrinterName, phPrinter, pDefault)

#uselib "winspool.drv"
#func global OpenPrinterA "OpenPrinterA" sptr, sptr, sptr
; OpenPrinterA pPrinterName, varptr(phPrinter), varptr(pDefault)   ; 戻り値は stat
; pPrinterName : LPCSTR optional -> "sptr"
; phPrinter : PRINTER_HANDLE* out -> "sptr"
; pDefault : PRINTER_DEFAULTSA* optional -> "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 OpenPrinterA "OpenPrinterA" str, var, var
; res = OpenPrinterA(pPrinterName, phPrinter, pDefault)
; pPrinterName : LPCSTR optional -> "str"
; phPrinter : PRINTER_HANDLE* out -> "var"
; pDefault : PRINTER_DEFAULTSA* optional -> "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 OpenPrinterA(LPCSTR pPrinterName, PRINTER_HANDLE* phPrinter, PRINTER_DEFAULTSA* pDefault)
#uselib "winspool.drv"
#cfunc global OpenPrinterA "OpenPrinterA" str, var, var
; res = OpenPrinterA(pPrinterName, phPrinter, pDefault)
; pPrinterName : LPCSTR optional -> "str"
; phPrinter : PRINTER_HANDLE* out -> "var"
; pDefault : PRINTER_DEFAULTSA* optional -> "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")
	procOpenPrinterA = winspool_drv.NewProc("OpenPrinterA")
)

// pPrinterName (LPCSTR optional), phPrinter (PRINTER_HANDLE* out), pDefault (PRINTER_DEFAULTSA* optional)
r1, _, err := procOpenPrinterA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pPrinterName))),
	uintptr(phPrinter),
	uintptr(pDefault),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function OpenPrinterA(
  pPrinterName: PAnsiChar;   // LPCSTR optional
  phPrinter: Pointer;   // PRINTER_HANDLE* out
  pDefault: Pointer   // PRINTER_DEFAULTSA* optional
): BOOL; stdcall;
  external 'winspool.drv' name 'OpenPrinterA';

result := DllCall("winspool.drv\OpenPrinterA"
    , "AStr", pPrinterName   ; LPCSTR optional
    , "Ptr", phPrinter   ; PRINTER_HANDLE* out
    , "Ptr", pDefault   ; PRINTER_DEFAULTSA* optional
    , "Int")   ; return: BOOL

●OpenPrinterA(pPrinterName, phPrinter, pDefault) = DLL("winspool.drv", "bool OpenPrinterA(char*, void*, void*)")
# 呼び出し: OpenPrinterA(pPrinterName, phPrinter, pDefault)
# pPrinterName : LPCSTR optional -> "char*"
# phPrinter : PRINTER_HANDLE* out -> "void*"
# pDefault : PRINTER_DEFAULTSA* optional -> "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)。