GetCommMask

// KERNEL32.dll
#include <windows.h>

BOOL GetCommMask(
    HANDLE hFile,
    COMM_EVENT_MASK* lpEvtMask
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetCommMask(
    hFile As IntPtr,   ' HANDLE
    <Out> ByRef lpEvtMask As UInteger   ' COMM_EVENT_MASK* out
) As Boolean
End Function

' hFile : HANDLE
' lpEvtMask : COMM_EVENT_MASK* out
Declare PtrSafe Function GetCommMask Lib "kernel32" ( _
    ByVal hFile As LongPtr, _
    ByRef lpEvtMask 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

GetCommMask = ctypes.windll.kernel32.GetCommMask
GetCommMask.restype = wintypes.BOOL
GetCommMask.argtypes = [
    wintypes.HANDLE,  # hFile : HANDLE
    ctypes.c_void_p,  # lpEvtMask : COMM_EVENT_MASK* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetCommMask = Fiddle::Function.new(
  lib['GetCommMask'],
  [
    Fiddle::TYPE_VOIDP,  # hFile : HANDLE
    Fiddle::TYPE_VOIDP,  # lpEvtMask : COMM_EVENT_MASK* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetCommMask(
        hFile: *mut core::ffi::c_void,  // HANDLE
        lpEvtMask: *mut u32  // COMM_EVENT_MASK* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool GetCommMask(IntPtr hFile, out uint lpEvtMask);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetCommMask' -Namespace Win32 -PassThru
# $api::GetCommMask(hFile, lpEvtMask)

#uselib "KERNEL32.dll"
#func global GetCommMask "GetCommMask" sptr, sptr
; GetCommMask hFile, lpEvtMask   ; 戻り値は stat
; hFile : HANDLE -> "sptr"
; lpEvtMask : COMM_EVENT_MASK* 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 "KERNEL32.dll"
#cfunc global GetCommMask "GetCommMask" sptr, int
; res = GetCommMask(hFile, lpEvtMask)
; hFile : HANDLE -> "sptr"
; lpEvtMask : COMM_EVENT_MASK* out -> "int"

; BOOL GetCommMask(HANDLE hFile, COMM_EVENT_MASK* lpEvtMask)
#uselib "KERNEL32.dll"
#cfunc global GetCommMask "GetCommMask" intptr, int
; res = GetCommMask(hFile, lpEvtMask)
; hFile : HANDLE -> "intptr"
; lpEvtMask : COMM_EVENT_MASK* out -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetCommMask = kernel32.NewProc("GetCommMask")
)

// hFile (HANDLE), lpEvtMask (COMM_EVENT_MASK* out)
r1, _, err := procGetCommMask.Call(
	uintptr(hFile),
	uintptr(lpEvtMask),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetCommMask(
  hFile: THandle;   // HANDLE
  lpEvtMask: Pointer   // COMM_EVENT_MASK* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetCommMask';

result := DllCall("KERNEL32\GetCommMask"
    , "Ptr", hFile   ; HANDLE
    , "Ptr", lpEvtMask   ; COMM_EVENT_MASK* out
    , "Int")   ; return: BOOL

●GetCommMask(hFile, lpEvtMask) = DLL("KERNEL32.dll", "bool GetCommMask(void*, void*)")
# 呼び出し: GetCommMask(hFile, lpEvtMask)
# hFile : HANDLE -> "void*"
# lpEvtMask : COMM_EVENT_MASK* 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)。