midiConnect

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

DWORD midiConnect(
    HMIDI hmi,
    HMIDIOUT hmo,
    void* pReserved   // optional
);

<DllImport("WINMM.dll", ExactSpelling:=True)>
Public Shared Function midiConnect(
    hmi As IntPtr,   ' HMIDI
    hmo As IntPtr,   ' HMIDIOUT
    pReserved As IntPtr   ' void* optional
) As UInteger
End Function

' hmi : HMIDI
' hmo : HMIDIOUT
' pReserved : void* optional
Declare PtrSafe Function midiConnect Lib "winmm" ( _
    ByVal hmi As LongPtr, _
    ByVal hmo As LongPtr, _
    ByVal pReserved As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

midiConnect = ctypes.windll.winmm.midiConnect
midiConnect.restype = wintypes.DWORD
midiConnect.argtypes = [
    wintypes.HANDLE,  # hmi : HMIDI
    wintypes.HANDLE,  # hmo : HMIDIOUT
    ctypes.POINTER(None),  # pReserved : void* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINMM.dll')
midiConnect = Fiddle::Function.new(
  lib['midiConnect'],
  [
    Fiddle::TYPE_VOIDP,  # hmi : HMIDI
    Fiddle::TYPE_VOIDP,  # hmo : HMIDIOUT
    Fiddle::TYPE_VOIDP,  # pReserved : void* optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "winmm")]
extern "system" {
    fn midiConnect(
        hmi: *mut core::ffi::c_void,  // HMIDI
        hmo: *mut core::ffi::c_void,  // HMIDIOUT
        pReserved: *mut ()  // void* optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINMM.dll")]
public static extern uint midiConnect(IntPtr hmi, IntPtr hmo, IntPtr pReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINMM_midiConnect' -Namespace Win32 -PassThru
# $api::midiConnect(hmi, hmo, pReserved)

#uselib "WINMM.dll"
#func global midiConnect "midiConnect" sptr, sptr, sptr
; midiConnect hmi, hmo, pReserved   ; 戻り値は stat
; hmi : HMIDI -> "sptr"
; hmo : HMIDIOUT -> "sptr"
; pReserved : void* optional -> "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 midiConnect "midiConnect" sptr, sptr, sptr
; res = midiConnect(hmi, hmo, pReserved)
; hmi : HMIDI -> "sptr"
; hmo : HMIDIOUT -> "sptr"
; pReserved : void* optional -> "sptr"

; DWORD midiConnect(HMIDI hmi, HMIDIOUT hmo, void* pReserved)
#uselib "WINMM.dll"
#cfunc global midiConnect "midiConnect" intptr, intptr, intptr
; res = midiConnect(hmi, hmo, pReserved)
; hmi : HMIDI -> "intptr"
; hmo : HMIDIOUT -> "intptr"
; pReserved : void* optional -> "intptr"

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

var (
	winmm = windows.NewLazySystemDLL("WINMM.dll")
	procmidiConnect = winmm.NewProc("midiConnect")
)

// hmi (HMIDI), hmo (HMIDIOUT), pReserved (void* optional)
r1, _, err := procmidiConnect.Call(
	uintptr(hmi),
	uintptr(hmo),
	uintptr(pReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function midiConnect(
  hmi: THandle;   // HMIDI
  hmo: THandle;   // HMIDIOUT
  pReserved: Pointer   // void* optional
): DWORD; stdcall;
  external 'WINMM.dll' name 'midiConnect';

result := DllCall("WINMM\midiConnect"
    , "Ptr", hmi   ; HMIDI
    , "Ptr", hmo   ; HMIDIOUT
    , "Ptr", pReserved   ; void* optional
    , "UInt")   ; return: DWORD

●midiConnect(hmi, hmo, pReserved) = DLL("WINMM.dll", "dword midiConnect(void*, void*, void*)")
# 呼び出し: midiConnect(hmi, hmo, pReserved)
# hmi : HMIDI -> "void*"
# hmo : HMIDIOUT -> "void*"
# pReserved : void* optional -> "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)。