midiInUnprepareHeader

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

DWORD midiInUnprepareHeader(
    HMIDIIN hmi,
    MIDIHDR* pmh,
    DWORD cbmh
);

<DllImport("WINMM.dll", ExactSpelling:=True)>
Public Shared Function midiInUnprepareHeader(
    hmi As IntPtr,   ' HMIDIIN
    pmh As IntPtr,   ' MIDIHDR* in/out
    cbmh As UInteger   ' DWORD
) As UInteger
End Function

' hmi : HMIDIIN
' pmh : MIDIHDR* in/out
' cbmh : DWORD
Declare PtrSafe Function midiInUnprepareHeader Lib "winmm" ( _
    ByVal hmi As LongPtr, _
    ByVal pmh As LongPtr, _
    ByVal cbmh 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

midiInUnprepareHeader = ctypes.windll.winmm.midiInUnprepareHeader
midiInUnprepareHeader.restype = wintypes.DWORD
midiInUnprepareHeader.argtypes = [
    wintypes.HANDLE,  # hmi : HMIDIIN
    ctypes.c_void_p,  # pmh : MIDIHDR* in/out
    wintypes.DWORD,  # cbmh : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINMM.dll')
midiInUnprepareHeader = Fiddle::Function.new(
  lib['midiInUnprepareHeader'],
  [
    Fiddle::TYPE_VOIDP,  # hmi : HMIDIIN
    Fiddle::TYPE_VOIDP,  # pmh : MIDIHDR* in/out
    -Fiddle::TYPE_INT,  # cbmh : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "winmm")]
extern "system" {
    fn midiInUnprepareHeader(
        hmi: *mut core::ffi::c_void,  // HMIDIIN
        pmh: *mut MIDIHDR,  // MIDIHDR* in/out
        cbmh: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "WINMM.dll"
#func global midiInUnprepareHeader "midiInUnprepareHeader" sptr, sptr, sptr
; midiInUnprepareHeader hmi, varptr(pmh), cbmh   ; 戻り値は stat
; hmi : HMIDIIN -> "sptr"
; pmh : MIDIHDR* in/out -> "sptr"
; cbmh : 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 midiInUnprepareHeader "midiInUnprepareHeader" sptr, var, int
; res = midiInUnprepareHeader(hmi, pmh, cbmh)
; hmi : HMIDIIN -> "sptr"
; pmh : MIDIHDR* in/out -> "var"
; cbmh : 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 midiInUnprepareHeader(HMIDIIN hmi, MIDIHDR* pmh, DWORD cbmh)
#uselib "WINMM.dll"
#cfunc global midiInUnprepareHeader "midiInUnprepareHeader" intptr, var, int
; res = midiInUnprepareHeader(hmi, pmh, cbmh)
; hmi : HMIDIIN -> "intptr"
; pmh : MIDIHDR* in/out -> "var"
; cbmh : 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")
	procmidiInUnprepareHeader = winmm.NewProc("midiInUnprepareHeader")
)

// hmi (HMIDIIN), pmh (MIDIHDR* in/out), cbmh (DWORD)
r1, _, err := procmidiInUnprepareHeader.Call(
	uintptr(hmi),
	uintptr(pmh),
	uintptr(cbmh),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function midiInUnprepareHeader(
  hmi: THandle;   // HMIDIIN
  pmh: Pointer;   // MIDIHDR* in/out
  cbmh: DWORD   // DWORD
): DWORD; stdcall;
  external 'WINMM.dll' name 'midiInUnprepareHeader';

result := DllCall("WINMM\midiInUnprepareHeader"
    , "Ptr", hmi   ; HMIDIIN
    , "Ptr", pmh   ; MIDIHDR* in/out
    , "UInt", cbmh   ; DWORD
    , "UInt")   ; return: DWORD

●midiInUnprepareHeader(hmi, pmh, cbmh) = DLL("WINMM.dll", "dword midiInUnprepareHeader(void*, void*, dword)")
# 呼び出し: midiInUnprepareHeader(hmi, pmh, cbmh)
# hmi : HMIDIIN -> "void*"
# pmh : MIDIHDR* in/out -> "void*"
# cbmh : 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)。