EnumMonitorsA

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

BOOL EnumMonitorsA(
    LPSTR pName,   // optional
    DWORD Level,
    BYTE* pMonitor,   // optional
    DWORD cbBuf,
    DWORD* pcbNeeded,
    DWORD* pcReturned
);

<DllImport("winspool.drv", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function EnumMonitorsA(
    <MarshalAs(UnmanagedType.LPStr)> pName As String,   ' LPSTR optional
    Level As UInteger,   ' DWORD
    pMonitor As IntPtr,   ' BYTE* optional, out
    cbBuf As UInteger,   ' DWORD
    <Out> ByRef pcbNeeded As UInteger,   ' DWORD* out
    <Out> ByRef pcReturned As UInteger   ' DWORD* out
) As Boolean
End Function

' pName : LPSTR optional
' Level : DWORD
' pMonitor : BYTE* optional, out
' cbBuf : DWORD
' pcbNeeded : DWORD* out
' pcReturned : DWORD* out
Declare PtrSafe Function EnumMonitorsA Lib "winspool.drv" ( _
    ByVal pName As String, _
    ByVal Level As Long, _
    ByVal pMonitor As LongPtr, _
    ByVal cbBuf As Long, _
    ByRef pcbNeeded As Long, _
    ByRef pcReturned As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

EnumMonitorsA = ctypes.windll.LoadLibrary("winspool.drv").EnumMonitorsA
EnumMonitorsA.restype = wintypes.BOOL
EnumMonitorsA.argtypes = [
    wintypes.LPCSTR,  # pName : LPSTR optional
    wintypes.DWORD,  # Level : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pMonitor : BYTE* optional, out
    wintypes.DWORD,  # cbBuf : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pcbNeeded : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # pcReturned : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('winspool.drv')
EnumMonitorsA = Fiddle::Function.new(
  lib['EnumMonitorsA'],
  [
    Fiddle::TYPE_VOIDP,  # pName : LPSTR optional
    -Fiddle::TYPE_INT,  # Level : DWORD
    Fiddle::TYPE_VOIDP,  # pMonitor : BYTE* optional, out
    -Fiddle::TYPE_INT,  # cbBuf : DWORD
    Fiddle::TYPE_VOIDP,  # pcbNeeded : DWORD* out
    Fiddle::TYPE_VOIDP,  # pcReturned : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winspool.drv")]
extern "system" {
    fn EnumMonitorsA(
        pName: *mut u8,  // LPSTR optional
        Level: u32,  // DWORD
        pMonitor: *mut u8,  // BYTE* optional, out
        cbBuf: u32,  // DWORD
        pcbNeeded: *mut u32,  // DWORD* out
        pcReturned: *mut u32  // DWORD* out
    ) -> 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 EnumMonitorsA([MarshalAs(UnmanagedType.LPStr)] string pName, uint Level, IntPtr pMonitor, uint cbBuf, out uint pcbNeeded, out uint pcReturned);
"@
$api = Add-Type -MemberDefinition $sig -Name 'winspool.drv_EnumMonitorsA' -Namespace Win32 -PassThru
# $api::EnumMonitorsA(pName, Level, pMonitor, cbBuf, pcbNeeded, pcReturned)

#uselib "winspool.drv"
#func global EnumMonitorsA "EnumMonitorsA" sptr, sptr, sptr, sptr, sptr, sptr
; EnumMonitorsA pName, Level, varptr(pMonitor), cbBuf, varptr(pcbNeeded), varptr(pcReturned)   ; 戻り値は stat
; pName : LPSTR optional -> "sptr"
; Level : DWORD -> "sptr"
; pMonitor : BYTE* optional, out -> "sptr"
; cbBuf : DWORD -> "sptr"
; pcbNeeded : DWORD* out -> "sptr"
; pcReturned : DWORD* out -> "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 EnumMonitorsA "EnumMonitorsA" str, int, var, int, var, var
; res = EnumMonitorsA(pName, Level, pMonitor, cbBuf, pcbNeeded, pcReturned)
; pName : LPSTR optional -> "str"
; Level : DWORD -> "int"
; pMonitor : BYTE* optional, out -> "var"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "var"
; pcReturned : DWORD* out -> "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 EnumMonitorsA(LPSTR pName, DWORD Level, BYTE* pMonitor, DWORD cbBuf, DWORD* pcbNeeded, DWORD* pcReturned)
#uselib "winspool.drv"
#cfunc global EnumMonitorsA "EnumMonitorsA" str, int, var, int, var, var
; res = EnumMonitorsA(pName, Level, pMonitor, cbBuf, pcbNeeded, pcReturned)
; pName : LPSTR optional -> "str"
; Level : DWORD -> "int"
; pMonitor : BYTE* optional, out -> "var"
; cbBuf : DWORD -> "int"
; pcbNeeded : DWORD* out -> "var"
; pcReturned : DWORD* out -> "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")
	procEnumMonitorsA = winspool_drv.NewProc("EnumMonitorsA")
)

// pName (LPSTR optional), Level (DWORD), pMonitor (BYTE* optional, out), cbBuf (DWORD), pcbNeeded (DWORD* out), pcReturned (DWORD* out)
r1, _, err := procEnumMonitorsA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pName))),
	uintptr(Level),
	uintptr(pMonitor),
	uintptr(cbBuf),
	uintptr(pcbNeeded),
	uintptr(pcReturned),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumMonitorsA(
  pName: PAnsiChar;   // LPSTR optional
  Level: DWORD;   // DWORD
  pMonitor: Pointer;   // BYTE* optional, out
  cbBuf: DWORD;   // DWORD
  pcbNeeded: Pointer;   // DWORD* out
  pcReturned: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'winspool.drv' name 'EnumMonitorsA';

result := DllCall("winspool.drv\EnumMonitorsA"
    , "AStr", pName   ; LPSTR optional
    , "UInt", Level   ; DWORD
    , "Ptr", pMonitor   ; BYTE* optional, out
    , "UInt", cbBuf   ; DWORD
    , "Ptr", pcbNeeded   ; DWORD* out
    , "Ptr", pcReturned   ; DWORD* out
    , "Int")   ; return: BOOL

●EnumMonitorsA(pName, Level, pMonitor, cbBuf, pcbNeeded, pcReturned) = DLL("winspool.drv", "bool EnumMonitorsA(char*, dword, void*, dword, void*, void*)")
# 呼び出し: EnumMonitorsA(pName, Level, pMonitor, cbBuf, pcbNeeded, pcReturned)
# pName : LPSTR optional -> "char*"
# Level : DWORD -> "dword"
# pMonitor : BYTE* optional, out -> "void*"
# cbBuf : DWORD -> "dword"
# pcbNeeded : DWORD* out -> "void*"
# pcReturned : DWORD* out -> "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)。