BluetoothGATTGetCharacteristicValue

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

HRESULT BluetoothGATTGetCharacteristicValue(
    HANDLE hDevice,
    BTH_LE_GATT_CHARACTERISTIC* Characteristic,
    DWORD CharacteristicValueDataSize,
    BTH_LE_GATT_CHARACTERISTIC_VALUE* CharacteristicValue,   // optional
    WORD* CharacteristicValueSizeRequired,   // optional
    DWORD Flags
);

<DllImport("BluetoothApis.dll", ExactSpelling:=True)>
Public Shared Function BluetoothGATTGetCharacteristicValue(
    hDevice As IntPtr,   ' HANDLE
    Characteristic As IntPtr,   ' BTH_LE_GATT_CHARACTERISTIC*
    CharacteristicValueDataSize As UInteger,   ' DWORD
    CharacteristicValue As IntPtr,   ' BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out
    CharacteristicValueSizeRequired As IntPtr,   ' WORD* optional, out
    Flags As UInteger   ' DWORD
) As Integer
End Function

' hDevice : HANDLE
' Characteristic : BTH_LE_GATT_CHARACTERISTIC*
' CharacteristicValueDataSize : DWORD
' CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out
' CharacteristicValueSizeRequired : WORD* optional, out
' Flags : DWORD
Declare PtrSafe Function BluetoothGATTGetCharacteristicValue Lib "bluetoothapis" ( _
    ByVal hDevice As LongPtr, _
    ByVal Characteristic As LongPtr, _
    ByVal CharacteristicValueDataSize As Long, _
    ByVal CharacteristicValue As LongPtr, _
    ByVal CharacteristicValueSizeRequired As LongPtr, _
    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

BluetoothGATTGetCharacteristicValue = ctypes.windll.bluetoothapis.BluetoothGATTGetCharacteristicValue
BluetoothGATTGetCharacteristicValue.restype = ctypes.c_int
BluetoothGATTGetCharacteristicValue.argtypes = [
    wintypes.HANDLE,  # hDevice : HANDLE
    ctypes.c_void_p,  # Characteristic : BTH_LE_GATT_CHARACTERISTIC*
    wintypes.DWORD,  # CharacteristicValueDataSize : DWORD
    ctypes.c_void_p,  # CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out
    ctypes.POINTER(ctypes.c_ushort),  # CharacteristicValueSizeRequired : WORD* optional, out
    wintypes.DWORD,  # Flags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('BluetoothApis.dll')
BluetoothGATTGetCharacteristicValue = Fiddle::Function.new(
  lib['BluetoothGATTGetCharacteristicValue'],
  [
    Fiddle::TYPE_VOIDP,  # hDevice : HANDLE
    Fiddle::TYPE_VOIDP,  # Characteristic : BTH_LE_GATT_CHARACTERISTIC*
    -Fiddle::TYPE_INT,  # CharacteristicValueDataSize : DWORD
    Fiddle::TYPE_VOIDP,  # CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out
    Fiddle::TYPE_VOIDP,  # CharacteristicValueSizeRequired : WORD* optional, out
    -Fiddle::TYPE_INT,  # Flags : DWORD
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("BluetoothApis.dll")]
public static extern int BluetoothGATTGetCharacteristicValue(IntPtr hDevice, IntPtr Characteristic, uint CharacteristicValueDataSize, IntPtr CharacteristicValue, IntPtr CharacteristicValueSizeRequired, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'BluetoothApis_BluetoothGATTGetCharacteristicValue' -Namespace Win32 -PassThru
# $api::BluetoothGATTGetCharacteristicValue(hDevice, Characteristic, CharacteristicValueDataSize, CharacteristicValue, CharacteristicValueSizeRequired, Flags)

#uselib "BluetoothApis.dll"
#func global BluetoothGATTGetCharacteristicValue "BluetoothGATTGetCharacteristicValue" sptr, sptr, sptr, sptr, sptr, sptr
; BluetoothGATTGetCharacteristicValue hDevice, varptr(Characteristic), CharacteristicValueDataSize, varptr(CharacteristicValue), varptr(CharacteristicValueSizeRequired), Flags   ; 戻り値は stat
; hDevice : HANDLE -> "sptr"
; Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "sptr"
; CharacteristicValueDataSize : DWORD -> "sptr"
; CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out -> "sptr"
; CharacteristicValueSizeRequired : WORD* optional, 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 BluetoothGATTGetCharacteristicValue "BluetoothGATTGetCharacteristicValue" sptr, var, int, var, var, int
; res = BluetoothGATTGetCharacteristicValue(hDevice, Characteristic, CharacteristicValueDataSize, CharacteristicValue, CharacteristicValueSizeRequired, Flags)
; hDevice : HANDLE -> "sptr"
; Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "var"
; CharacteristicValueDataSize : DWORD -> "int"
; CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out -> "var"
; CharacteristicValueSizeRequired : WORD* optional, 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 BluetoothGATTGetCharacteristicValue(HANDLE hDevice, BTH_LE_GATT_CHARACTERISTIC* Characteristic, DWORD CharacteristicValueDataSize, BTH_LE_GATT_CHARACTERISTIC_VALUE* CharacteristicValue, WORD* CharacteristicValueSizeRequired, DWORD Flags)
#uselib "BluetoothApis.dll"
#cfunc global BluetoothGATTGetCharacteristicValue "BluetoothGATTGetCharacteristicValue" intptr, var, int, var, var, int
; res = BluetoothGATTGetCharacteristicValue(hDevice, Characteristic, CharacteristicValueDataSize, CharacteristicValue, CharacteristicValueSizeRequired, Flags)
; hDevice : HANDLE -> "intptr"
; Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "var"
; CharacteristicValueDataSize : DWORD -> "int"
; CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out -> "var"
; CharacteristicValueSizeRequired : WORD* optional, 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")
	procBluetoothGATTGetCharacteristicValue = bluetoothapis.NewProc("BluetoothGATTGetCharacteristicValue")
)

// hDevice (HANDLE), Characteristic (BTH_LE_GATT_CHARACTERISTIC*), CharacteristicValueDataSize (DWORD), CharacteristicValue (BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out), CharacteristicValueSizeRequired (WORD* optional, out), Flags (DWORD)
r1, _, err := procBluetoothGATTGetCharacteristicValue.Call(
	uintptr(hDevice),
	uintptr(Characteristic),
	uintptr(CharacteristicValueDataSize),
	uintptr(CharacteristicValue),
	uintptr(CharacteristicValueSizeRequired),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function BluetoothGATTGetCharacteristicValue(
  hDevice: THandle;   // HANDLE
  Characteristic: Pointer;   // BTH_LE_GATT_CHARACTERISTIC*
  CharacteristicValueDataSize: DWORD;   // DWORD
  CharacteristicValue: Pointer;   // BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out
  CharacteristicValueSizeRequired: Pointer;   // WORD* optional, out
  Flags: DWORD   // DWORD
): Integer; stdcall;
  external 'BluetoothApis.dll' name 'BluetoothGATTGetCharacteristicValue';

result := DllCall("BluetoothApis\BluetoothGATTGetCharacteristicValue"
    , "Ptr", hDevice   ; HANDLE
    , "Ptr", Characteristic   ; BTH_LE_GATT_CHARACTERISTIC*
    , "UInt", CharacteristicValueDataSize   ; DWORD
    , "Ptr", CharacteristicValue   ; BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out
    , "Ptr", CharacteristicValueSizeRequired   ; WORD* optional, out
    , "UInt", Flags   ; DWORD
    , "Int")   ; return: HRESULT

●BluetoothGATTGetCharacteristicValue(hDevice, Characteristic, CharacteristicValueDataSize, CharacteristicValue, CharacteristicValueSizeRequired, Flags) = DLL("BluetoothApis.dll", "int BluetoothGATTGetCharacteristicValue(void*, void*, dword, void*, void*, dword)")
# 呼び出し: BluetoothGATTGetCharacteristicValue(hDevice, Characteristic, CharacteristicValueDataSize, CharacteristicValue, CharacteristicValueSizeRequired, Flags)
# hDevice : HANDLE -> "void*"
# Characteristic : BTH_LE_GATT_CHARACTERISTIC* -> "void*"
# CharacteristicValueDataSize : DWORD -> "dword"
# CharacteristicValue : BTH_LE_GATT_CHARACTERISTIC_VALUE* optional, out -> "void*"
# CharacteristicValueSizeRequired : WORD* optional, 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)。