BluetoothGATTGetDescriptors

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

HRESULT BluetoothGATTGetDescriptors(
    HANDLE hDevice,
    BTH_LE_GATT_CHARACTERISTIC* Characteristic,
    WORD DescriptorsBufferCount,
    BTH_LE_GATT_DESCRIPTOR* DescriptorsBuffer,   // optional
    WORD* DescriptorsBufferActual,
    DWORD Flags
);

<DllImport("BluetoothApis.dll", ExactSpelling:=True)>
Public Shared Function BluetoothGATTGetDescriptors(
    hDevice As IntPtr,   ' HANDLE
    Characteristic As IntPtr,   ' BTH_LE_GATT_CHARACTERISTIC*
    DescriptorsBufferCount As UShort,   ' WORD
    DescriptorsBuffer As IntPtr,   ' BTH_LE_GATT_DESCRIPTOR* optional, out
    <Out> ByRef DescriptorsBufferActual As UShort,   ' WORD* out
    Flags As UInteger   ' DWORD
) As Integer
End Function

' hDevice : HANDLE
' Characteristic : BTH_LE_GATT_CHARACTERISTIC*
' DescriptorsBufferCount : WORD
' DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out
' DescriptorsBufferActual : WORD* out
' Flags : DWORD
Declare PtrSafe Function BluetoothGATTGetDescriptors Lib "bluetoothapis" ( _
    ByVal hDevice As LongPtr, _
    ByVal Characteristic As LongPtr, _
    ByVal DescriptorsBufferCount As Integer, _
    ByVal DescriptorsBuffer As LongPtr, _
    ByRef DescriptorsBufferActual As Integer, _
    ByVal Flags 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

BluetoothGATTGetDescriptors = ctypes.windll.bluetoothapis.BluetoothGATTGetDescriptors
BluetoothGATTGetDescriptors.restype = ctypes.c_int
BluetoothGATTGetDescriptors.argtypes = [
    wintypes.HANDLE,  # hDevice : HANDLE
    ctypes.c_void_p,  # Characteristic : BTH_LE_GATT_CHARACTERISTIC*
    ctypes.c_ushort,  # DescriptorsBufferCount : WORD
    ctypes.c_void_p,  # DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out
    ctypes.POINTER(ctypes.c_ushort),  # DescriptorsBufferActual : WORD* out
    wintypes.DWORD,  # Flags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('BluetoothApis.dll')
BluetoothGATTGetDescriptors = Fiddle::Function.new(
  lib['BluetoothGATTGetDescriptors'],
  [
    Fiddle::TYPE_VOIDP,  # hDevice : HANDLE
    Fiddle::TYPE_VOIDP,  # Characteristic : BTH_LE_GATT_CHARACTERISTIC*
    -Fiddle::TYPE_SHORT,  # DescriptorsBufferCount : WORD
    Fiddle::TYPE_VOIDP,  # DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out
    Fiddle::TYPE_VOIDP,  # DescriptorsBufferActual : WORD* out
    -Fiddle::TYPE_INT,  # Flags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "bluetoothapis")]
extern "system" {
    fn BluetoothGATTGetDescriptors(
        hDevice: *mut core::ffi::c_void,  // HANDLE
        Characteristic: *mut BTH_LE_GATT_CHARACTERISTIC,  // BTH_LE_GATT_CHARACTERISTIC*
        DescriptorsBufferCount: u16,  // WORD
        DescriptorsBuffer: *mut BTH_LE_GATT_DESCRIPTOR,  // BTH_LE_GATT_DESCRIPTOR* optional, out
        DescriptorsBufferActual: *mut u16,  // WORD* out
        Flags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("BluetoothApis.dll")]
public static extern int BluetoothGATTGetDescriptors(IntPtr hDevice, IntPtr Characteristic, ushort DescriptorsBufferCount, IntPtr DescriptorsBuffer, out ushort DescriptorsBufferActual, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'BluetoothApis_BluetoothGATTGetDescriptors' -Namespace Win32 -PassThru
# $api::BluetoothGATTGetDescriptors(hDevice, Characteristic, DescriptorsBufferCount, DescriptorsBuffer, DescriptorsBufferActual, Flags)

#uselib "BluetoothApis.dll"
#func global BluetoothGATTGetDescriptors "BluetoothGATTGetDescriptors" sptr, sptr, sptr, sptr, sptr, sptr
; BluetoothGATTGetDescriptors hDevice, varptr(Characteristic), DescriptorsBufferCount, varptr(DescriptorsBuffer), varptr(DescriptorsBufferActual), Flags   ; 戻り値は stat
; hDevice : HANDLE -> "sptr"
; Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "sptr"
; DescriptorsBufferCount : WORD -> "sptr"
; DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out -> "sptr"
; DescriptorsBufferActual : WORD* out -> "sptr"
; Flags : DWORD -> "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 "BluetoothApis.dll"
#cfunc global BluetoothGATTGetDescriptors "BluetoothGATTGetDescriptors" sptr, var, int, var, var, int
; res = BluetoothGATTGetDescriptors(hDevice, Characteristic, DescriptorsBufferCount, DescriptorsBuffer, DescriptorsBufferActual, Flags)
; hDevice : HANDLE -> "sptr"
; Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "var"
; DescriptorsBufferCount : WORD -> "int"
; DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out -> "var"
; DescriptorsBufferActual : WORD* out -> "var"
; Flags : DWORD -> "int"
; ※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 BluetoothGATTGetDescriptors(HANDLE hDevice, BTH_LE_GATT_CHARACTERISTIC* Characteristic, WORD DescriptorsBufferCount, BTH_LE_GATT_DESCRIPTOR* DescriptorsBuffer, WORD* DescriptorsBufferActual, DWORD Flags)
#uselib "BluetoothApis.dll"
#cfunc global BluetoothGATTGetDescriptors "BluetoothGATTGetDescriptors" intptr, var, int, var, var, int
; res = BluetoothGATTGetDescriptors(hDevice, Characteristic, DescriptorsBufferCount, DescriptorsBuffer, DescriptorsBufferActual, Flags)
; hDevice : HANDLE -> "intptr"
; Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "var"
; DescriptorsBufferCount : WORD -> "int"
; DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out -> "var"
; DescriptorsBufferActual : WORD* out -> "var"
; Flags : DWORD -> "int"
; ※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 (
	bluetoothapis = windows.NewLazySystemDLL("BluetoothApis.dll")
	procBluetoothGATTGetDescriptors = bluetoothapis.NewProc("BluetoothGATTGetDescriptors")
)

// hDevice (HANDLE), Characteristic (BTH_LE_GATT_CHARACTERISTIC*), DescriptorsBufferCount (WORD), DescriptorsBuffer (BTH_LE_GATT_DESCRIPTOR* optional, out), DescriptorsBufferActual (WORD* out), Flags (DWORD)
r1, _, err := procBluetoothGATTGetDescriptors.Call(
	uintptr(hDevice),
	uintptr(Characteristic),
	uintptr(DescriptorsBufferCount),
	uintptr(DescriptorsBuffer),
	uintptr(DescriptorsBufferActual),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function BluetoothGATTGetDescriptors(
  hDevice: THandle;   // HANDLE
  Characteristic: Pointer;   // BTH_LE_GATT_CHARACTERISTIC*
  DescriptorsBufferCount: Word;   // WORD
  DescriptorsBuffer: Pointer;   // BTH_LE_GATT_DESCRIPTOR* optional, out
  DescriptorsBufferActual: Pointer;   // WORD* out
  Flags: DWORD   // DWORD
): Integer; stdcall;
  external 'BluetoothApis.dll' name 'BluetoothGATTGetDescriptors';

result := DllCall("BluetoothApis\BluetoothGATTGetDescriptors"
    , "Ptr", hDevice   ; HANDLE
    , "Ptr", Characteristic   ; BTH_LE_GATT_CHARACTERISTIC*
    , "UShort", DescriptorsBufferCount   ; WORD
    , "Ptr", DescriptorsBuffer   ; BTH_LE_GATT_DESCRIPTOR* optional, out
    , "Ptr", DescriptorsBufferActual   ; WORD* out
    , "UInt", Flags   ; DWORD
    , "Int")   ; return: HRESULT

●BluetoothGATTGetDescriptors(hDevice, Characteristic, DescriptorsBufferCount, DescriptorsBuffer, DescriptorsBufferActual, Flags) = DLL("BluetoothApis.dll", "int BluetoothGATTGetDescriptors(void*, void*, int, void*, void*, dword)")
# 呼び出し: BluetoothGATTGetDescriptors(hDevice, Characteristic, DescriptorsBufferCount, DescriptorsBuffer, DescriptorsBufferActual, Flags)
# hDevice : HANDLE -> "void*"
# Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "void*"
# DescriptorsBufferCount : WORD -> "int"
# DescriptorsBuffer : BTH_LE_GATT_DESCRIPTOR* optional, out -> "void*"
# DescriptorsBufferActual : WORD* out -> "void*"
# Flags : DWORD -> "dword"
# 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)。