SetFormA

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

BOOL SetFormA(
    PRINTER_HANDLE hPrinter,
    LPCSTR pFormName,
    DWORD Level,
    BYTE* pForm
);

<DllImport("winspool.drv", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SetFormA(
    hPrinter As PRINTER_HANDLE,   ' PRINTER_HANDLE
    <MarshalAs(UnmanagedType.LPStr)> pFormName As String,   ' LPCSTR
    Level As UInteger,   ' DWORD
    pForm As IntPtr   ' BYTE*
) As Boolean
End Function

' hPrinter : PRINTER_HANDLE
' pFormName : LPCSTR
' Level : DWORD
' pForm : BYTE*
Declare PtrSafe Function SetFormA Lib "winspool.drv" ( _
    ByVal hPrinter As LongPtr, _
    ByVal pFormName As String, _
    ByVal Level As Long, _
    ByVal pForm 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

SetFormA = ctypes.windll.LoadLibrary("winspool.drv").SetFormA
SetFormA.restype = wintypes.BOOL
SetFormA.argtypes = [
    PRINTER_HANDLE,  # hPrinter : PRINTER_HANDLE
    wintypes.LPCSTR,  # pFormName : LPCSTR
    wintypes.DWORD,  # Level : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pForm : BYTE*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
SetFormA = Fiddle::Function.new(
  lib['SetFormA'],
  [
    Fiddle::TYPE_VOIDP,  # hPrinter : PRINTER_HANDLE
    Fiddle::TYPE_VOIDP,  # pFormName : LPCSTR
    -Fiddle::TYPE_INT,  # Level : DWORD
    Fiddle::TYPE_VOIDP,  # pForm : BYTE*
  ],
  Fiddle::TYPE_INT)

#[link(name = "winspool.drv")]
extern "system" {
    fn SetFormA(
        hPrinter: PRINTER_HANDLE,  // PRINTER_HANDLE
        pFormName: *const u8,  // LPCSTR
        Level: u32,  // DWORD
        pForm: *mut u8  // BYTE*
    ) -> 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 SetFormA(PRINTER_HANDLE hPrinter, [MarshalAs(UnmanagedType.LPStr)] string pFormName, uint Level, IntPtr pForm);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_SetFormA' -Namespace Win32 -PassThru
# $api::SetFormA(hPrinter, pFormName, Level, pForm)

#uselib "winspool.drv"
#func global SetFormA "SetFormA" sptr, sptr, sptr, sptr
; SetFormA hPrinter, pFormName, Level, varptr(pForm)   ; 戻り値は stat
; hPrinter : PRINTER_HANDLE -> "sptr"
; pFormName : LPCSTR -> "sptr"
; Level : DWORD -> "sptr"
; pForm : BYTE* -> "sptr"
; ※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 SetFormA "SetFormA" int, str, int, var
; res = SetFormA(hPrinter, pFormName, Level, pForm)
; hPrinter : PRINTER_HANDLE -> "int"
; pFormName : LPCSTR -> "str"
; Level : DWORD -> "int"
; pForm : BYTE* -> "var"
; ※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。

; BOOL SetFormA(PRINTER_HANDLE hPrinter, LPCSTR pFormName, DWORD Level, BYTE* pForm)
#uselib "winspool.drv"
#cfunc global SetFormA "SetFormA" int, str, int, var
; res = SetFormA(hPrinter, pFormName, Level, pForm)
; hPrinter : PRINTER_HANDLE -> "int"
; pFormName : LPCSTR -> "str"
; Level : DWORD -> "int"
; pForm : BYTE* -> "var"
; ※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")
	procSetFormA = winspool_drv.NewProc("SetFormA")
)

// hPrinter (PRINTER_HANDLE), pFormName (LPCSTR), Level (DWORD), pForm (BYTE*)
r1, _, err := procSetFormA.Call(
	uintptr(hPrinter),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pFormName))),
	uintptr(Level),
	uintptr(pForm),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetFormA(
  hPrinter: PRINTER_HANDLE;   // PRINTER_HANDLE
  pFormName: PAnsiChar;   // LPCSTR
  Level: DWORD;   // DWORD
  pForm: Pointer   // BYTE*
): BOOL; stdcall;
  external 'winspool.drv' name 'SetFormA';

result := DllCall("winspool.drv\SetFormA"
    , "Ptr", hPrinter   ; PRINTER_HANDLE
    , "AStr", pFormName   ; LPCSTR
    , "UInt", Level   ; DWORD
    , "Ptr", pForm   ; BYTE*
    , "Int")   ; return: BOOL

●SetFormA(hPrinter, pFormName, Level, pForm) = DLL("winspool.drv", "bool SetFormA(void*, char*, dword, void*)")
# 呼び出し: SetFormA(hPrinter, pFormName, Level, pForm)
# hPrinter : PRINTER_HANDLE -> "void*"
# pFormName : LPCSTR -> "char*"
# Level : DWORD -> "dword"
# pForm : BYTE* -> "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)。