auxSetVolume

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

DWORD auxSetVolume(
    DWORD uDeviceID,
    DWORD dwVolume
);

<DllImport("WINMM.dll", ExactSpelling:=True)>
Public Shared Function auxSetVolume(
    uDeviceID As UInteger,   ' DWORD
    dwVolume As UInteger   ' DWORD
) As UInteger
End Function

' uDeviceID : DWORD
' dwVolume : DWORD
Declare PtrSafe Function auxSetVolume Lib "winmm" ( _
    ByVal uDeviceID As Long, _
    ByVal dwVolume 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

auxSetVolume = ctypes.windll.winmm.auxSetVolume
auxSetVolume.restype = wintypes.DWORD
auxSetVolume.argtypes = [
    wintypes.DWORD,  # uDeviceID : DWORD
    wintypes.DWORD,  # dwVolume : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINMM.dll')
auxSetVolume = Fiddle::Function.new(
  lib['auxSetVolume'],
  [
    -Fiddle::TYPE_INT,  # uDeviceID : DWORD
    -Fiddle::TYPE_INT,  # dwVolume : DWORD
  ],
  -Fiddle::TYPE_INT)

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

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

#uselib "WINMM.dll"
#func global auxSetVolume "auxSetVolume" sptr, sptr
; auxSetVolume uDeviceID, dwVolume   ; 戻り値は stat
; uDeviceID : DWORD -> "sptr"
; dwVolume : 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 "WINMM.dll"
#cfunc global auxSetVolume "auxSetVolume" int, int
; res = auxSetVolume(uDeviceID, dwVolume)
; uDeviceID : DWORD -> "int"
; dwVolume : DWORD -> "int"

; DWORD auxSetVolume(DWORD uDeviceID, DWORD dwVolume)
#uselib "WINMM.dll"
#cfunc global auxSetVolume "auxSetVolume" int, int
; res = auxSetVolume(uDeviceID, dwVolume)
; uDeviceID : DWORD -> "int"
; dwVolume : DWORD -> "int"

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

var (
	winmm = windows.NewLazySystemDLL("WINMM.dll")
	procauxSetVolume = winmm.NewProc("auxSetVolume")
)

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

function auxSetVolume(
  uDeviceID: DWORD;   // DWORD
  dwVolume: DWORD   // DWORD
): DWORD; stdcall;
  external 'WINMM.dll' name 'auxSetVolume';

result := DllCall("WINMM\auxSetVolume"
    , "UInt", uDeviceID   ; DWORD
    , "UInt", dwVolume   ; DWORD
    , "UInt")   ; return: DWORD

●auxSetVolume(uDeviceID, dwVolume) = DLL("WINMM.dll", "dword auxSetVolume(dword, dword)")
# 呼び出し: auxSetVolume(uDeviceID, dwVolume)
# uDeviceID : DWORD -> "dword"
# dwVolume : 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)。