SnmpEntityToStr

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

DWORD SnmpEntityToStr(
    INT_PTR entity,
    DWORD size,
    LPSTR string
);

<DllImport("wsnmp32.dll", ExactSpelling:=True)>
Public Shared Function SnmpEntityToStr(
    entity As IntPtr,   ' INT_PTR
    size As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPStr)> [string] As System.Text.StringBuilder   ' LPSTR out
) As UInteger
End Function

' entity : INT_PTR
' size : DWORD
' string : LPSTR out
Declare PtrSafe Function SnmpEntityToStr Lib "wsnmp32" ( _
    ByVal entity As LongPtr, _
    ByVal size As Long, _
    ByVal string As String) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SnmpEntityToStr = ctypes.windll.wsnmp32.SnmpEntityToStr
SnmpEntityToStr.restype = wintypes.DWORD
SnmpEntityToStr.argtypes = [
    ctypes.c_ssize_t,  # entity : INT_PTR
    wintypes.DWORD,  # size : DWORD
    wintypes.LPSTR,  # string : LPSTR out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wsnmp32.dll')
SnmpEntityToStr = Fiddle::Function.new(
  lib['SnmpEntityToStr'],
  [
    Fiddle::TYPE_INTPTR_T,  # entity : INT_PTR
    -Fiddle::TYPE_INT,  # size : DWORD
    Fiddle::TYPE_VOIDP,  # string : LPSTR out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wsnmp32")]
extern "system" {
    fn SnmpEntityToStr(
        entity: isize,  // INT_PTR
        size: u32,  // DWORD
        string: *mut u8  // LPSTR out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wsnmp32.dll")]
public static extern uint SnmpEntityToStr(IntPtr entity, uint size, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder string);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wsnmp32_SnmpEntityToStr' -Namespace Win32 -PassThru
# $api::SnmpEntityToStr(entity, size, string)

#uselib "wsnmp32.dll"
#func global SnmpEntityToStr "SnmpEntityToStr" sptr, sptr, sptr
; SnmpEntityToStr entity, size, varptr(string)   ; 戻り値は stat
; entity : INT_PTR -> "sptr"
; size : DWORD -> "sptr"
; string : LPSTR 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 SnmpEntityToStr "SnmpEntityToStr" sptr, int, var
; res = SnmpEntityToStr(entity, size, string)
; entity : INT_PTR -> "sptr"
; size : DWORD -> "int"
; string : LPSTR 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 SnmpEntityToStr(INT_PTR entity, DWORD size, LPSTR string)
#uselib "wsnmp32.dll"
#cfunc global SnmpEntityToStr "SnmpEntityToStr" intptr, int, var
; res = SnmpEntityToStr(entity, size, string)
; entity : INT_PTR -> "intptr"
; size : DWORD -> "int"
; string : LPSTR 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")
	procSnmpEntityToStr = wsnmp32.NewProc("SnmpEntityToStr")
)

// entity (INT_PTR), size (DWORD), string (LPSTR out)
r1, _, err := procSnmpEntityToStr.Call(
	uintptr(entity),
	uintptr(size),
	uintptr(string),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SnmpEntityToStr(
  entity: NativeInt;   // INT_PTR
  size: DWORD;   // DWORD
  string: PAnsiChar   // LPSTR out
): DWORD; stdcall;
  external 'wsnmp32.dll' name 'SnmpEntityToStr';

result := DllCall("wsnmp32\SnmpEntityToStr"
    , "Ptr", entity   ; INT_PTR
    , "UInt", size   ; DWORD
    , "Ptr", string   ; LPSTR out
    , "UInt")   ; return: DWORD

●SnmpEntityToStr(entity, size, string) = DLL("wsnmp32.dll", "dword SnmpEntityToStr(int, dword, char*)")
# 呼び出し: SnmpEntityToStr(entity, size, string)
# entity : INT_PTR -> "int"
# size : DWORD -> "dword"
# string : LPSTR out -> "char*"
# 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)。