mixerGetNumDevs

関数

システム内のオーディオミキサーデバイス数を取得する。

DLLWINMM.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

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

DWORD mixerGetNumDevs(void);

パラメーターなし。戻り値: DWORD

各言語での呼び出し定義

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

DWORD mixerGetNumDevs(void);

[DllImport("WINMM.dll", ExactSpelling = true)]
static extern uint mixerGetNumDevs();

<DllImport("WINMM.dll", ExactSpelling:=True)>
Public Shared Function mixerGetNumDevs() As UInteger
End Function

Declare PtrSafe Function mixerGetNumDevs Lib "winmm" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

mixerGetNumDevs = ctypes.windll.winmm.mixerGetNumDevs
mixerGetNumDevs.restype = wintypes.DWORD
mixerGetNumDevs.argtypes = []

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINMM.dll')
mixerGetNumDevs = Fiddle::Function.new(
  lib['mixerGetNumDevs'],
  [],
  -Fiddle::TYPE_INT)

#[link(name = "winmm")]
extern "system" {
    fn mixerGetNumDevs() -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINMM.dll")]
public static extern uint mixerGetNumDevs();
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINMM_mixerGetNumDevs' -Namespace Win32 -PassThru
# $api::mixerGetNumDevs()

#uselib "WINMM.dll"
#func global mixerGetNumDevs "mixerGetNumDevs"
; mixerGetNumDevs   ; 戻り値は stat
; ※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 "WINMM.dll"
#cfunc global mixerGetNumDevs "mixerGetNumDevs"
; res = mixerGetNumDevs()

; DWORD mixerGetNumDevs()
#uselib "WINMM.dll"
#cfunc global mixerGetNumDevs "mixerGetNumDevs"
; res = mixerGetNumDevs()

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

var (
	winmm = windows.NewLazySystemDLL("WINMM.dll")
	procmixerGetNumDevs = winmm.NewProc("mixerGetNumDevs")
)

r1, _, err := procmixerGetNumDevs.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function mixerGetNumDevs: DWORD; stdcall;
  external 'WINMM.dll' name 'mixerGetNumDevs';

result := DllCall("WINMM\mixerGetNumDevs", "UInt")

●mixerGetNumDevs() = DLL("WINMM.dll", "dword mixerGetNumDevs()")
# 呼び出し: mixerGetNumDevs()
# 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)。