DwmGetTransportAttributes

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

HRESULT DwmGetTransportAttributes(
    BOOL* pfIsRemoting,
    BOOL* pfIsConnected,
    DWORD* pDwGeneration
);

<DllImport("dwmapi.dll", ExactSpelling:=True)>
Public Shared Function DwmGetTransportAttributes(
    <Out> ByRef pfIsRemoting As Integer,   ' BOOL* out
    <Out> ByRef pfIsConnected As Integer,   ' BOOL* out
    <Out> ByRef pDwGeneration As UInteger   ' DWORD* out
) As Integer
End Function

' pfIsRemoting : BOOL* out
' pfIsConnected : BOOL* out
' pDwGeneration : DWORD* out
Declare PtrSafe Function DwmGetTransportAttributes Lib "dwmapi" ( _
    ByRef pfIsRemoting As Long, _
    ByRef pfIsConnected As Long, _
    ByRef pDwGeneration 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

DwmGetTransportAttributes = ctypes.windll.dwmapi.DwmGetTransportAttributes
DwmGetTransportAttributes.restype = ctypes.c_int
DwmGetTransportAttributes.argtypes = [
    ctypes.c_void_p,  # pfIsRemoting : BOOL* out
    ctypes.c_void_p,  # pfIsConnected : BOOL* out
    ctypes.POINTER(wintypes.DWORD),  # pDwGeneration : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dwmapi.dll')
DwmGetTransportAttributes = Fiddle::Function.new(
  lib['DwmGetTransportAttributes'],
  [
    Fiddle::TYPE_VOIDP,  # pfIsRemoting : BOOL* out
    Fiddle::TYPE_VOIDP,  # pfIsConnected : BOOL* out
    Fiddle::TYPE_VOIDP,  # pDwGeneration : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dwmapi")]
extern "system" {
    fn DwmGetTransportAttributes(
        pfIsRemoting: *mut i32,  // BOOL* out
        pfIsConnected: *mut i32,  // BOOL* out
        pDwGeneration: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dwmapi.dll")]
public static extern int DwmGetTransportAttributes(out int pfIsRemoting, out int pfIsConnected, out uint pDwGeneration);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dwmapi_DwmGetTransportAttributes' -Namespace Win32 -PassThru
# $api::DwmGetTransportAttributes(pfIsRemoting, pfIsConnected, pDwGeneration)

#uselib "dwmapi.dll"
#func global DwmGetTransportAttributes "DwmGetTransportAttributes" sptr, sptr, sptr
; DwmGetTransportAttributes pfIsRemoting, pfIsConnected, varptr(pDwGeneration)   ; 戻り値は stat
; pfIsRemoting : BOOL* out -> "sptr"
; pfIsConnected : BOOL* out -> "sptr"
; pDwGeneration : 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 "dwmapi.dll"
#cfunc global DwmGetTransportAttributes "DwmGetTransportAttributes" int, int, var
; res = DwmGetTransportAttributes(pfIsRemoting, pfIsConnected, pDwGeneration)
; pfIsRemoting : BOOL* out -> "int"
; pfIsConnected : BOOL* out -> "int"
; pDwGeneration : 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。

; HRESULT DwmGetTransportAttributes(BOOL* pfIsRemoting, BOOL* pfIsConnected, DWORD* pDwGeneration)
#uselib "dwmapi.dll"
#cfunc global DwmGetTransportAttributes "DwmGetTransportAttributes" int, int, var
; res = DwmGetTransportAttributes(pfIsRemoting, pfIsConnected, pDwGeneration)
; pfIsRemoting : BOOL* out -> "int"
; pfIsConnected : BOOL* out -> "int"
; pDwGeneration : 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 (
	dwmapi = windows.NewLazySystemDLL("dwmapi.dll")
	procDwmGetTransportAttributes = dwmapi.NewProc("DwmGetTransportAttributes")
)

// pfIsRemoting (BOOL* out), pfIsConnected (BOOL* out), pDwGeneration (DWORD* out)
r1, _, err := procDwmGetTransportAttributes.Call(
	uintptr(pfIsRemoting),
	uintptr(pfIsConnected),
	uintptr(pDwGeneration),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DwmGetTransportAttributes(
  pfIsRemoting: Pointer;   // BOOL* out
  pfIsConnected: Pointer;   // BOOL* out
  pDwGeneration: Pointer   // DWORD* out
): Integer; stdcall;
  external 'dwmapi.dll' name 'DwmGetTransportAttributes';

result := DllCall("dwmapi\DwmGetTransportAttributes"
    , "Ptr", pfIsRemoting   ; BOOL* out
    , "Ptr", pfIsConnected   ; BOOL* out
    , "Ptr", pDwGeneration   ; DWORD* out
    , "Int")   ; return: HRESULT

●DwmGetTransportAttributes(pfIsRemoting, pfIsConnected, pDwGeneration) = DLL("dwmapi.dll", "int DwmGetTransportAttributes(void*, void*, void*)")
# 呼び出し: DwmGetTransportAttributes(pfIsRemoting, pfIsConnected, pDwGeneration)
# pfIsRemoting : BOOL* out -> "void*"
# pfIsConnected : BOOL* out -> "void*"
# pDwGeneration : 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)。