SetPrinterDataW

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

DWORD SetPrinterDataW(
    PRINTER_HANDLE hPrinter,
    LPCWSTR pValueName,
    DWORD Type,
    BYTE* pData,
    DWORD cbData
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SetPrinterDataW(
    hPrinter As PRINTER_HANDLE,   ' PRINTER_HANDLE
    <MarshalAs(UnmanagedType.LPWStr)> pValueName As String,   ' LPCWSTR
    Type As UInteger,   ' DWORD
    pData As IntPtr,   ' BYTE*
    cbData As UInteger   ' DWORD
) As UInteger
End Function

' hPrinter : PRINTER_HANDLE
' pValueName : LPCWSTR
' Type : DWORD
' pData : BYTE*
' cbData : DWORD
Declare PtrSafe Function SetPrinterDataW Lib "winspool.drv" ( _
    ByVal hPrinter As LongPtr, _
    ByVal pValueName As LongPtr, _
    ByVal Type As Long, _
    ByVal pData As LongPtr, _
    ByVal cbData 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

SetPrinterDataW = ctypes.windll.LoadLibrary("winspool.drv").SetPrinterDataW
SetPrinterDataW.restype = wintypes.DWORD
SetPrinterDataW.argtypes = [
    PRINTER_HANDLE,  # hPrinter : PRINTER_HANDLE
    wintypes.LPCWSTR,  # pValueName : LPCWSTR
    wintypes.DWORD,  # Type : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pData : BYTE*
    wintypes.DWORD,  # cbData : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
SetPrinterDataW = Fiddle::Function.new(
  lib['SetPrinterDataW'],
  [
    Fiddle::TYPE_VOIDP,  # hPrinter : PRINTER_HANDLE
    Fiddle::TYPE_VOIDP,  # pValueName : LPCWSTR
    -Fiddle::TYPE_INT,  # Type : DWORD
    Fiddle::TYPE_VOIDP,  # pData : BYTE*
    -Fiddle::TYPE_INT,  # cbData : DWORD
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winspool.drv")]
extern "system" {
    fn SetPrinterDataW(
        hPrinter: PRINTER_HANDLE,  // PRINTER_HANDLE
        pValueName: *const u16,  // LPCWSTR
        Type: u32,  // DWORD
        pData: *mut u8,  // BYTE*
        cbData: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("winspool.drv", CharSet = CharSet.Unicode)]
public static extern uint SetPrinterDataW(PRINTER_HANDLE hPrinter, [MarshalAs(UnmanagedType.LPWStr)] string pValueName, uint Type, IntPtr pData, uint cbData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_SetPrinterDataW' -Namespace Win32 -PassThru
# $api::SetPrinterDataW(hPrinter, pValueName, Type, pData, cbData)

#uselib "winspool.drv"
#func global SetPrinterDataW "SetPrinterDataW" wptr, wptr, wptr, wptr, wptr
; SetPrinterDataW hPrinter, pValueName, Type, varptr(pData), cbData   ; 戻り値は stat
; hPrinter : PRINTER_HANDLE -> "wptr"
; pValueName : LPCWSTR -> "wptr"
; Type : DWORD -> "wptr"
; pData : BYTE* -> "wptr"
; cbData : DWORD -> "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。

#uselib "winspool.drv"
#cfunc global SetPrinterDataW "SetPrinterDataW" int, wstr, int, var, int
; res = SetPrinterDataW(hPrinter, pValueName, Type, pData, cbData)
; hPrinter : PRINTER_HANDLE -> "int"
; pValueName : LPCWSTR -> "wstr"
; Type : DWORD -> "int"
; pData : BYTE* -> "var"
; cbData : DWORD -> "int"
; ※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。

; DWORD SetPrinterDataW(PRINTER_HANDLE hPrinter, LPCWSTR pValueName, DWORD Type, BYTE* pData, DWORD cbData)
#uselib "winspool.drv"
#cfunc global SetPrinterDataW "SetPrinterDataW" int, wstr, int, var, int
; res = SetPrinterDataW(hPrinter, pValueName, Type, pData, cbData)
; hPrinter : PRINTER_HANDLE -> "int"
; pValueName : LPCWSTR -> "wstr"
; Type : DWORD -> "int"
; pData : BYTE* -> "var"
; cbData : DWORD -> "int"
; ※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。

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

var (
	winspool_drv = windows.NewLazySystemDLL("winspool.drv")
	procSetPrinterDataW = winspool_drv.NewProc("SetPrinterDataW")
)

// hPrinter (PRINTER_HANDLE), pValueName (LPCWSTR), Type (DWORD), pData (BYTE*), cbData (DWORD)
r1, _, err := procSetPrinterDataW.Call(
	uintptr(hPrinter),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pValueName))),
	uintptr(Type),
	uintptr(pData),
	uintptr(cbData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SetPrinterDataW(
  hPrinter: PRINTER_HANDLE;   // PRINTER_HANDLE
  pValueName: PWideChar;   // LPCWSTR
  Type: DWORD;   // DWORD
  pData: Pointer;   // BYTE*
  cbData: DWORD   // DWORD
): DWORD; stdcall;
  external 'winspool.drv' name 'SetPrinterDataW';

result := DllCall("winspool.drv\SetPrinterDataW"
    , "Ptr", hPrinter   ; PRINTER_HANDLE
    , "WStr", pValueName   ; LPCWSTR
    , "UInt", Type   ; DWORD
    , "Ptr", pData   ; BYTE*
    , "UInt", cbData   ; DWORD
    , "UInt")   ; return: DWORD

●SetPrinterDataW(hPrinter, pValueName, Type, pData, cbData) = DLL("winspool.drv", "dword SetPrinterDataW(void*, char*, dword, void*, dword)")
# 呼び出し: SetPrinterDataW(hPrinter, pValueName, Type, pData, cbData)
# hPrinter : PRINTER_HANDLE -> "void*"
# pValueName : LPCWSTR -> "char*"
# Type : DWORD -> "dword"
# pData : BYTE* -> "void*"
# cbData : DWORD -> "dword"
# 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。