midiStreamOpen

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

DWORD midiStreamOpen(
    HMIDISTRM* phms,
    DWORD* puDeviceID,
    DWORD cMidi,
    UINT_PTR dwCallback,   // optional
    UINT_PTR dwInstance,   // optional
    DWORD fdwOpen
);

<DllImport("WINMM.dll", ExactSpelling:=True)>
Public Shared Function midiStreamOpen(
    phms As IntPtr,   ' HMIDISTRM* out
    ByRef puDeviceID As UInteger,   ' DWORD* in/out
    cMidi As UInteger,   ' DWORD
    dwCallback As UIntPtr,   ' UINT_PTR optional
    dwInstance As UIntPtr,   ' UINT_PTR optional
    fdwOpen As UInteger   ' DWORD
) As UInteger
End Function

' phms : HMIDISTRM* out
' puDeviceID : DWORD* in/out
' cMidi : DWORD
' dwCallback : UINT_PTR optional
' dwInstance : UINT_PTR optional
' fdwOpen : DWORD
Declare PtrSafe Function midiStreamOpen Lib "winmm" ( _
    ByVal phms As LongPtr, _
    ByRef puDeviceID As Long, _
    ByVal cMidi As Long, _
    ByVal dwCallback As LongPtr, _
    ByVal dwInstance As LongPtr, _
    ByVal fdwOpen 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

midiStreamOpen = ctypes.windll.winmm.midiStreamOpen
midiStreamOpen.restype = wintypes.DWORD
midiStreamOpen.argtypes = [
    ctypes.c_void_p,  # phms : HMIDISTRM* out
    ctypes.POINTER(wintypes.DWORD),  # puDeviceID : DWORD* in/out
    wintypes.DWORD,  # cMidi : DWORD
    ctypes.c_size_t,  # dwCallback : UINT_PTR optional
    ctypes.c_size_t,  # dwInstance : UINT_PTR optional
    wintypes.DWORD,  # fdwOpen : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINMM.dll')
midiStreamOpen = Fiddle::Function.new(
  lib['midiStreamOpen'],
  [
    Fiddle::TYPE_VOIDP,  # phms : HMIDISTRM* out
    Fiddle::TYPE_VOIDP,  # puDeviceID : DWORD* in/out
    -Fiddle::TYPE_INT,  # cMidi : DWORD
    Fiddle::TYPE_UINTPTR_T,  # dwCallback : UINT_PTR optional
    Fiddle::TYPE_UINTPTR_T,  # dwInstance : UINT_PTR optional
    -Fiddle::TYPE_INT,  # fdwOpen : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "winmm")]
extern "system" {
    fn midiStreamOpen(
        phms: *mut *mut core::ffi::c_void,  // HMIDISTRM* out
        puDeviceID: *mut u32,  // DWORD* in/out
        cMidi: u32,  // DWORD
        dwCallback: usize,  // UINT_PTR optional
        dwInstance: usize,  // UINT_PTR optional
        fdwOpen: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINMM.dll")]
public static extern uint midiStreamOpen(IntPtr phms, ref uint puDeviceID, uint cMidi, UIntPtr dwCallback, UIntPtr dwInstance, uint fdwOpen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINMM_midiStreamOpen' -Namespace Win32 -PassThru
# $api::midiStreamOpen(phms, puDeviceID, cMidi, dwCallback, dwInstance, fdwOpen)

#uselib "WINMM.dll"
#func global midiStreamOpen "midiStreamOpen" sptr, sptr, sptr, sptr, sptr, sptr
; midiStreamOpen phms, varptr(puDeviceID), cMidi, dwCallback, dwInstance, fdwOpen   ; 戻り値は stat
; phms : HMIDISTRM* out -> "sptr"
; puDeviceID : DWORD* in/out -> "sptr"
; cMidi : DWORD -> "sptr"
; dwCallback : UINT_PTR optional -> "sptr"
; dwInstance : UINT_PTR optional -> "sptr"
; fdwOpen : 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 midiStreamOpen "midiStreamOpen" sptr, var, int, sptr, sptr, int
; res = midiStreamOpen(phms, puDeviceID, cMidi, dwCallback, dwInstance, fdwOpen)
; phms : HMIDISTRM* out -> "sptr"
; puDeviceID : DWORD* in/out -> "var"
; cMidi : DWORD -> "int"
; dwCallback : UINT_PTR optional -> "sptr"
; dwInstance : UINT_PTR optional -> "sptr"
; fdwOpen : DWORD -> "int"
; ※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。

; DWORD midiStreamOpen(HMIDISTRM* phms, DWORD* puDeviceID, DWORD cMidi, UINT_PTR dwCallback, UINT_PTR dwInstance, DWORD fdwOpen)
#uselib "WINMM.dll"
#cfunc global midiStreamOpen "midiStreamOpen" intptr, var, int, intptr, intptr, int
; res = midiStreamOpen(phms, puDeviceID, cMidi, dwCallback, dwInstance, fdwOpen)
; phms : HMIDISTRM* out -> "intptr"
; puDeviceID : DWORD* in/out -> "var"
; cMidi : DWORD -> "int"
; dwCallback : UINT_PTR optional -> "intptr"
; dwInstance : UINT_PTR optional -> "intptr"
; fdwOpen : DWORD -> "int"
; ※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 (
	winmm = windows.NewLazySystemDLL("WINMM.dll")
	procmidiStreamOpen = winmm.NewProc("midiStreamOpen")
)

// phms (HMIDISTRM* out), puDeviceID (DWORD* in/out), cMidi (DWORD), dwCallback (UINT_PTR optional), dwInstance (UINT_PTR optional), fdwOpen (DWORD)
r1, _, err := procmidiStreamOpen.Call(
	uintptr(phms),
	uintptr(puDeviceID),
	uintptr(cMidi),
	uintptr(dwCallback),
	uintptr(dwInstance),
	uintptr(fdwOpen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function midiStreamOpen(
  phms: Pointer;   // HMIDISTRM* out
  puDeviceID: Pointer;   // DWORD* in/out
  cMidi: DWORD;   // DWORD
  dwCallback: NativeUInt;   // UINT_PTR optional
  dwInstance: NativeUInt;   // UINT_PTR optional
  fdwOpen: DWORD   // DWORD
): DWORD; stdcall;
  external 'WINMM.dll' name 'midiStreamOpen';

result := DllCall("WINMM\midiStreamOpen"
    , "Ptr", phms   ; HMIDISTRM* out
    , "Ptr", puDeviceID   ; DWORD* in/out
    , "UInt", cMidi   ; DWORD
    , "UPtr", dwCallback   ; UINT_PTR optional
    , "UPtr", dwInstance   ; UINT_PTR optional
    , "UInt", fdwOpen   ; DWORD
    , "UInt")   ; return: DWORD

●midiStreamOpen(phms, puDeviceID, cMidi, dwCallback, dwInstance, fdwOpen) = DLL("WINMM.dll", "dword midiStreamOpen(void*, void*, dword, int, int, dword)")
# 呼び出し: midiStreamOpen(phms, puDeviceID, cMidi, dwCallback, dwInstance, fdwOpen)
# phms : HMIDISTRM* out -> "void*"
# puDeviceID : DWORD* in/out -> "void*"
# cMidi : DWORD -> "dword"
# dwCallback : UINT_PTR optional -> "int"
# dwInstance : UINT_PTR optional -> "int"
# fdwOpen : 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)。