AddPrintProcessorW

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

BOOL AddPrintProcessorW(
    LPCWSTR pName,   // optional
    LPCWSTR pEnvironment,   // optional
    LPCWSTR pPathName,
    LPCWSTR pPrintProcessorName
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function AddPrintProcessorW(
    <MarshalAs(UnmanagedType.LPWStr)> pName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pEnvironment As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pPathName As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pPrintProcessorName As String   ' LPCWSTR
) As Boolean
End Function

' pName : LPCWSTR optional
' pEnvironment : LPCWSTR optional
' pPathName : LPCWSTR
' pPrintProcessorName : LPCWSTR
Declare PtrSafe Function AddPrintProcessorW Lib "winspool.drv" ( _
    ByVal pName As LongPtr, _
    ByVal pEnvironment As LongPtr, _
    ByVal pPathName As LongPtr, _
    ByVal pPrintProcessorName As LongPtr) 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

AddPrintProcessorW = ctypes.windll.LoadLibrary("winspool.drv").AddPrintProcessorW
AddPrintProcessorW.restype = wintypes.BOOL
AddPrintProcessorW.argtypes = [
    wintypes.LPCWSTR,  # pName : LPCWSTR optional
    wintypes.LPCWSTR,  # pEnvironment : LPCWSTR optional
    wintypes.LPCWSTR,  # pPathName : LPCWSTR
    wintypes.LPCWSTR,  # pPrintProcessorName : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
AddPrintProcessorW = Fiddle::Function.new(
  lib['AddPrintProcessorW'],
  [
    Fiddle::TYPE_VOIDP,  # pName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pEnvironment : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pPathName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pPrintProcessorName : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winspool.drv")]
extern "system" {
    fn AddPrintProcessorW(
        pName: *const u16,  // LPCWSTR optional
        pEnvironment: *const u16,  // LPCWSTR optional
        pPathName: *const u16,  // LPCWSTR
        pPrintProcessorName: *const u16  // LPCWSTR
    ) -> 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 AddPrintProcessorW([MarshalAs(UnmanagedType.LPWStr)] string pName, [MarshalAs(UnmanagedType.LPWStr)] string pEnvironment, [MarshalAs(UnmanagedType.LPWStr)] string pPathName, [MarshalAs(UnmanagedType.LPWStr)] string pPrintProcessorName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_AddPrintProcessorW' -Namespace Win32 -PassThru
# $api::AddPrintProcessorW(pName, pEnvironment, pPathName, pPrintProcessorName)

#uselib "winspool.drv"
#func global AddPrintProcessorW "AddPrintProcessorW" wptr, wptr, wptr, wptr
; AddPrintProcessorW pName, pEnvironment, pPathName, pPrintProcessorName   ; 戻り値は stat
; pName : LPCWSTR optional -> "wptr"
; pEnvironment : LPCWSTR optional -> "wptr"
; pPathName : LPCWSTR -> "wptr"
; pPrintProcessorName : LPCWSTR -> "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。

#uselib "winspool.drv"
#cfunc global AddPrintProcessorW "AddPrintProcessorW" wstr, wstr, wstr, wstr
; res = AddPrintProcessorW(pName, pEnvironment, pPathName, pPrintProcessorName)
; pName : LPCWSTR optional -> "wstr"
; pEnvironment : LPCWSTR optional -> "wstr"
; pPathName : LPCWSTR -> "wstr"
; pPrintProcessorName : LPCWSTR -> "wstr"

; BOOL AddPrintProcessorW(LPCWSTR pName, LPCWSTR pEnvironment, LPCWSTR pPathName, LPCWSTR pPrintProcessorName)
#uselib "winspool.drv"
#cfunc global AddPrintProcessorW "AddPrintProcessorW" wstr, wstr, wstr, wstr
; res = AddPrintProcessorW(pName, pEnvironment, pPathName, pPrintProcessorName)
; pName : LPCWSTR optional -> "wstr"
; pEnvironment : LPCWSTR optional -> "wstr"
; pPathName : LPCWSTR -> "wstr"
; pPrintProcessorName : LPCWSTR -> "wstr"

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

var (
	winspool_drv = windows.NewLazySystemDLL("winspool.drv")
	procAddPrintProcessorW = winspool_drv.NewProc("AddPrintProcessorW")
)

// pName (LPCWSTR optional), pEnvironment (LPCWSTR optional), pPathName (LPCWSTR), pPrintProcessorName (LPCWSTR)
r1, _, err := procAddPrintProcessorW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pEnvironment))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pPathName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pPrintProcessorName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function AddPrintProcessorW(
  pName: PWideChar;   // LPCWSTR optional
  pEnvironment: PWideChar;   // LPCWSTR optional
  pPathName: PWideChar;   // LPCWSTR
  pPrintProcessorName: PWideChar   // LPCWSTR
): BOOL; stdcall;
  external 'winspool.drv' name 'AddPrintProcessorW';

result := DllCall("winspool.drv\AddPrintProcessorW"
    , "WStr", pName   ; LPCWSTR optional
    , "WStr", pEnvironment   ; LPCWSTR optional
    , "WStr", pPathName   ; LPCWSTR
    , "WStr", pPrintProcessorName   ; LPCWSTR
    , "Int")   ; return: BOOL

●AddPrintProcessorW(pName, pEnvironment, pPathName, pPrintProcessorName) = DLL("winspool.drv", "bool AddPrintProcessorW(char*, char*, char*, char*)")
# 呼び出し: AddPrintProcessorW(pName, pEnvironment, pPathName, pPrintProcessorName)
# pName : LPCWSTR optional -> "char*"
# pEnvironment : LPCWSTR optional -> "char*"
# pPathName : LPCWSTR -> "char*"
# pPrintProcessorName : LPCWSTR -> "char*"
# 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。