phoneGetGain

// TAPI32.dll
#include <windows.h>

INT phoneGetGain(
    DWORD hPhone,
    DWORD dwHookSwitchDev,
    DWORD* lpdwGain
);

<DllImport("TAPI32.dll", ExactSpelling:=True)>
Public Shared Function phoneGetGain(
    hPhone As UInteger,   ' DWORD
    dwHookSwitchDev As UInteger,   ' DWORD
    ByRef lpdwGain As UInteger   ' DWORD* in/out
) As Integer
End Function

' hPhone : DWORD
' dwHookSwitchDev : DWORD
' lpdwGain : DWORD* in/out
Declare PtrSafe Function phoneGetGain Lib "tapi32" ( _
    ByVal hPhone As Long, _
    ByVal dwHookSwitchDev As Long, _
    ByRef lpdwGain 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

phoneGetGain = ctypes.windll.tapi32.phoneGetGain
phoneGetGain.restype = ctypes.c_int
phoneGetGain.argtypes = [
    wintypes.DWORD,  # hPhone : DWORD
    wintypes.DWORD,  # dwHookSwitchDev : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpdwGain : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TAPI32.dll')
phoneGetGain = Fiddle::Function.new(
  lib['phoneGetGain'],
  [
    -Fiddle::TYPE_INT,  # hPhone : DWORD
    -Fiddle::TYPE_INT,  # dwHookSwitchDev : DWORD
    Fiddle::TYPE_VOIDP,  # lpdwGain : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "tapi32")]
extern "system" {
    fn phoneGetGain(
        hPhone: u32,  // DWORD
        dwHookSwitchDev: u32,  // DWORD
        lpdwGain: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TAPI32.dll")]
public static extern int phoneGetGain(uint hPhone, uint dwHookSwitchDev, ref uint lpdwGain);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TAPI32_phoneGetGain' -Namespace Win32 -PassThru
# $api::phoneGetGain(hPhone, dwHookSwitchDev, lpdwGain)

#uselib "TAPI32.dll"
#func global phoneGetGain "phoneGetGain" sptr, sptr, sptr
; phoneGetGain hPhone, dwHookSwitchDev, varptr(lpdwGain)   ; 戻り値は stat
; hPhone : DWORD -> "sptr"
; dwHookSwitchDev : DWORD -> "sptr"
; lpdwGain : DWORD* in/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 "TAPI32.dll"
#cfunc global phoneGetGain "phoneGetGain" int, int, var
; res = phoneGetGain(hPhone, dwHookSwitchDev, lpdwGain)
; hPhone : DWORD -> "int"
; dwHookSwitchDev : DWORD -> "int"
; lpdwGain : DWORD* in/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。

; INT phoneGetGain(DWORD hPhone, DWORD dwHookSwitchDev, DWORD* lpdwGain)
#uselib "TAPI32.dll"
#cfunc global phoneGetGain "phoneGetGain" int, int, var
; res = phoneGetGain(hPhone, dwHookSwitchDev, lpdwGain)
; hPhone : DWORD -> "int"
; dwHookSwitchDev : DWORD -> "int"
; lpdwGain : DWORD* in/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 (
	tapi32 = windows.NewLazySystemDLL("TAPI32.dll")
	procphoneGetGain = tapi32.NewProc("phoneGetGain")
)

// hPhone (DWORD), dwHookSwitchDev (DWORD), lpdwGain (DWORD* in/out)
r1, _, err := procphoneGetGain.Call(
	uintptr(hPhone),
	uintptr(dwHookSwitchDev),
	uintptr(lpdwGain),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function phoneGetGain(
  hPhone: DWORD;   // DWORD
  dwHookSwitchDev: DWORD;   // DWORD
  lpdwGain: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'TAPI32.dll' name 'phoneGetGain';

result := DllCall("TAPI32\phoneGetGain"
    , "UInt", hPhone   ; DWORD
    , "UInt", dwHookSwitchDev   ; DWORD
    , "Ptr", lpdwGain   ; DWORD* in/out
    , "Int")   ; return: INT

●phoneGetGain(hPhone, dwHookSwitchDev, lpdwGain) = DLL("TAPI32.dll", "int phoneGetGain(dword, dword, void*)")
# 呼び出し: phoneGetGain(hPhone, dwHookSwitchDev, lpdwGain)
# hPhone : DWORD -> "dword"
# dwHookSwitchDev : DWORD -> "dword"
# lpdwGain : DWORD* in/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)。