SnmpFreeDescriptor

// wsnmp32.dll
#include <windows.h>

DWORD SnmpFreeDescriptor(
    DWORD syntax,
    smiOCTETS* descriptor
);

<DllImport("wsnmp32.dll", ExactSpelling:=True)>
Public Shared Function SnmpFreeDescriptor(
    syntax As UInteger,   ' DWORD
    descriptor As IntPtr   ' smiOCTETS* in/out
) As UInteger
End Function

' syntax : DWORD
' descriptor : smiOCTETS* in/out
Declare PtrSafe Function SnmpFreeDescriptor Lib "wsnmp32" ( _
    ByVal syntax As Long, _
    ByVal descriptor 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

SnmpFreeDescriptor = ctypes.windll.wsnmp32.SnmpFreeDescriptor
SnmpFreeDescriptor.restype = wintypes.DWORD
SnmpFreeDescriptor.argtypes = [
    wintypes.DWORD,  # syntax : DWORD
    ctypes.c_void_p,  # descriptor : smiOCTETS* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wsnmp32.dll')
SnmpFreeDescriptor = Fiddle::Function.new(
  lib['SnmpFreeDescriptor'],
  [
    -Fiddle::TYPE_INT,  # syntax : DWORD
    Fiddle::TYPE_VOIDP,  # descriptor : smiOCTETS* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wsnmp32")]
extern "system" {
    fn SnmpFreeDescriptor(
        syntax: u32,  // DWORD
        descriptor: *mut smiOCTETS  // smiOCTETS* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wsnmp32.dll")]
public static extern uint SnmpFreeDescriptor(uint syntax, IntPtr descriptor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wsnmp32_SnmpFreeDescriptor' -Namespace Win32 -PassThru
# $api::SnmpFreeDescriptor(syntax, descriptor)

#uselib "wsnmp32.dll"
#func global SnmpFreeDescriptor "SnmpFreeDescriptor" sptr, sptr
; SnmpFreeDescriptor syntax, varptr(descriptor)   ; 戻り値は stat
; syntax : DWORD -> "sptr"
; descriptor : smiOCTETS* in/out -> "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 "wsnmp32.dll"
#cfunc global SnmpFreeDescriptor "SnmpFreeDescriptor" int, var
; res = SnmpFreeDescriptor(syntax, descriptor)
; syntax : DWORD -> "int"
; descriptor : smiOCTETS* in/out -> "var"
; ※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 SnmpFreeDescriptor(DWORD syntax, smiOCTETS* descriptor)
#uselib "wsnmp32.dll"
#cfunc global SnmpFreeDescriptor "SnmpFreeDescriptor" int, var
; res = SnmpFreeDescriptor(syntax, descriptor)
; syntax : DWORD -> "int"
; descriptor : smiOCTETS* in/out -> "var"
; ※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 (
	wsnmp32 = windows.NewLazySystemDLL("wsnmp32.dll")
	procSnmpFreeDescriptor = wsnmp32.NewProc("SnmpFreeDescriptor")
)

// syntax (DWORD), descriptor (smiOCTETS* in/out)
r1, _, err := procSnmpFreeDescriptor.Call(
	uintptr(syntax),
	uintptr(descriptor),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SnmpFreeDescriptor(
  syntax: DWORD;   // DWORD
  descriptor: Pointer   // smiOCTETS* in/out
): DWORD; stdcall;
  external 'wsnmp32.dll' name 'SnmpFreeDescriptor';

result := DllCall("wsnmp32\SnmpFreeDescriptor"
    , "UInt", syntax   ; DWORD
    , "Ptr", descriptor   ; smiOCTETS* in/out
    , "UInt")   ; return: DWORD

●SnmpFreeDescriptor(syntax, descriptor) = DLL("wsnmp32.dll", "dword SnmpFreeDescriptor(dword, void*)")
# 呼び出し: SnmpFreeDescriptor(syntax, descriptor)
# syntax : DWORD -> "dword"
# descriptor : smiOCTETS* in/out -> "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)。