midiInGetNumDevs

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

DWORD midiInGetNumDevs(void);

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

Declare PtrSafe Function midiInGetNumDevs 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

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

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "WINMM.dll"
#func global midiInGetNumDevs "midiInGetNumDevs"
; midiInGetNumDevs   ; 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 midiInGetNumDevs "midiInGetNumDevs"
; res = midiInGetNumDevs()

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

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

var (
	winmm = windows.NewLazySystemDLL("WINMM.dll")
	procmidiInGetNumDevs = winmm.NewProc("midiInGetNumDevs")
)

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

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

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

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