DeleteFormW

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

BOOL DeleteFormW(
    PRINTER_HANDLE hPrinter,
    LPCWSTR pFormName
);

<DllImport("winspool.drv", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function DeleteFormW(
    hPrinter As PRINTER_HANDLE,   ' PRINTER_HANDLE
    <MarshalAs(UnmanagedType.LPWStr)> pFormName As String   ' LPCWSTR
) As Boolean
End Function

' hPrinter : PRINTER_HANDLE
' pFormName : LPCWSTR
Declare PtrSafe Function DeleteFormW Lib "winspool.drv" ( _
    ByVal hPrinter As LongPtr, _
    ByVal pFormName 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

DeleteFormW = ctypes.windll.LoadLibrary("winspool.drv").DeleteFormW
DeleteFormW.restype = wintypes.BOOL
DeleteFormW.argtypes = [
    PRINTER_HANDLE,  # hPrinter : PRINTER_HANDLE
    wintypes.LPCWSTR,  # pFormName : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
DeleteFormW = Fiddle::Function.new(
  lib['DeleteFormW'],
  [
    Fiddle::TYPE_VOIDP,  # hPrinter : PRINTER_HANDLE
    Fiddle::TYPE_VOIDP,  # pFormName : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "winspool.drv")]
extern "system" {
    fn DeleteFormW(
        hPrinter: PRINTER_HANDLE,  // PRINTER_HANDLE
        pFormName: *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 DeleteFormW(PRINTER_HANDLE hPrinter, [MarshalAs(UnmanagedType.LPWStr)] string pFormName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_DeleteFormW' -Namespace Win32 -PassThru
# $api::DeleteFormW(hPrinter, pFormName)

#uselib "winspool.drv"
#func global DeleteFormW "DeleteFormW" wptr, wptr
; DeleteFormW hPrinter, pFormName   ; 戻り値は stat
; hPrinter : PRINTER_HANDLE -> "wptr"
; pFormName : LPCWSTR -> "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 DeleteFormW "DeleteFormW" int, wstr
; res = DeleteFormW(hPrinter, pFormName)
; hPrinter : PRINTER_HANDLE -> "int"
; pFormName : LPCWSTR -> "wstr"
; ※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。

; BOOL DeleteFormW(PRINTER_HANDLE hPrinter, LPCWSTR pFormName)
#uselib "winspool.drv"
#cfunc global DeleteFormW "DeleteFormW" int, wstr
; res = DeleteFormW(hPrinter, pFormName)
; hPrinter : PRINTER_HANDLE -> "int"
; pFormName : LPCWSTR -> "wstr"
; ※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。

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

var (
	winspool_drv = windows.NewLazySystemDLL("winspool.drv")
	procDeleteFormW = winspool_drv.NewProc("DeleteFormW")
)

// hPrinter (PRINTER_HANDLE), pFormName (LPCWSTR)
r1, _, err := procDeleteFormW.Call(
	uintptr(hPrinter),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pFormName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function DeleteFormW(
  hPrinter: PRINTER_HANDLE;   // PRINTER_HANDLE
  pFormName: PWideChar   // LPCWSTR
): BOOL; stdcall;
  external 'winspool.drv' name 'DeleteFormW';

result := DllCall("winspool.drv\DeleteFormW"
    , "Ptr", hPrinter   ; PRINTER_HANDLE
    , "WStr", pFormName   ; LPCWSTR
    , "Int")   ; return: BOOL

●DeleteFormW(hPrinter, pFormName) = DLL("winspool.drv", "bool DeleteFormW(void*, char*)")
# 呼び出し: DeleteFormW(hPrinter, pFormName)
# hPrinter : PRINTER_HANDLE -> "void*"
# pFormName : 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。