SnmpStrToOid

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

DWORD SnmpStrToOid(
    LPCSTR string,
    smiOID* dstOID
);

<DllImport("wsnmp32.dll", ExactSpelling:=True)>
Public Shared Function SnmpStrToOid(
    <MarshalAs(UnmanagedType.LPStr)> [string] As String,   ' LPCSTR
    dstOID As IntPtr   ' smiOID* in/out
) As UInteger
End Function

' string : LPCSTR
' dstOID : smiOID* in/out
Declare PtrSafe Function SnmpStrToOid Lib "wsnmp32" ( _
    ByVal string As String, _
    ByVal dstOID 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

SnmpStrToOid = ctypes.windll.wsnmp32.SnmpStrToOid
SnmpStrToOid.restype = wintypes.DWORD
SnmpStrToOid.argtypes = [
    wintypes.LPCSTR,  # string : LPCSTR
    ctypes.c_void_p,  # dstOID : smiOID* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wsnmp32.dll')
SnmpStrToOid = Fiddle::Function.new(
  lib['SnmpStrToOid'],
  [
    Fiddle::TYPE_VOIDP,  # string : LPCSTR
    Fiddle::TYPE_VOIDP,  # dstOID : smiOID* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wsnmp32")]
extern "system" {
    fn SnmpStrToOid(
        string: *const u8,  // LPCSTR
        dstOID: *mut smiOID  // smiOID* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wsnmp32.dll")]
public static extern uint SnmpStrToOid([MarshalAs(UnmanagedType.LPStr)] string string, IntPtr dstOID);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wsnmp32_SnmpStrToOid' -Namespace Win32 -PassThru
# $api::SnmpStrToOid(string, dstOID)

#uselib "wsnmp32.dll"
#func global SnmpStrToOid "SnmpStrToOid" sptr, sptr
; SnmpStrToOid string, varptr(dstOID)   ; 戻り値は stat
; string : LPCSTR -> "sptr"
; dstOID : smiOID* 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 SnmpStrToOid "SnmpStrToOid" str, var
; res = SnmpStrToOid(string, dstOID)
; string : LPCSTR -> "str"
; dstOID : smiOID* 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 SnmpStrToOid(LPCSTR string, smiOID* dstOID)
#uselib "wsnmp32.dll"
#cfunc global SnmpStrToOid "SnmpStrToOid" str, var
; res = SnmpStrToOid(string, dstOID)
; string : LPCSTR -> "str"
; dstOID : smiOID* 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")
	procSnmpStrToOid = wsnmp32.NewProc("SnmpStrToOid")
)

// string (LPCSTR), dstOID (smiOID* in/out)
r1, _, err := procSnmpStrToOid.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(string))),
	uintptr(dstOID),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SnmpStrToOid(
  string: PAnsiChar;   // LPCSTR
  dstOID: Pointer   // smiOID* in/out
): DWORD; stdcall;
  external 'wsnmp32.dll' name 'SnmpStrToOid';

result := DllCall("wsnmp32\SnmpStrToOid"
    , "AStr", string   ; LPCSTR
    , "Ptr", dstOID   ; smiOID* in/out
    , "UInt")   ; return: DWORD

●SnmpStrToOid(string, dstOID) = DLL("wsnmp32.dll", "dword SnmpStrToOid(char*, void*)")
# 呼び出し: SnmpStrToOid(string, dstOID)
# string : LPCSTR -> "char*"
# dstOID : smiOID* 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)。