SnmpStrToContext

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

INT_PTR SnmpStrToContext(
    INT_PTR session,
    smiOCTETS* string
);

<DllImport("wsnmp32.dll", ExactSpelling:=True)>
Public Shared Function SnmpStrToContext(
    session As IntPtr,   ' INT_PTR
    [string] As IntPtr   ' smiOCTETS* in/out
) As IntPtr
End Function

' session : INT_PTR
' string : smiOCTETS* in/out
Declare PtrSafe Function SnmpStrToContext Lib "wsnmp32" ( _
    ByVal session As LongPtr, _
    ByVal string As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SnmpStrToContext = ctypes.windll.wsnmp32.SnmpStrToContext
SnmpStrToContext.restype = ctypes.c_ssize_t
SnmpStrToContext.argtypes = [
    ctypes.c_ssize_t,  # session : INT_PTR
    ctypes.c_void_p,  # string : smiOCTETS* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wsnmp32.dll')
SnmpStrToContext = Fiddle::Function.new(
  lib['SnmpStrToContext'],
  [
    Fiddle::TYPE_INTPTR_T,  # session : INT_PTR
    Fiddle::TYPE_VOIDP,  # string : smiOCTETS* in/out
  ],
  Fiddle::TYPE_INTPTR_T)

#[link(name = "wsnmp32")]
extern "system" {
    fn SnmpStrToContext(
        session: isize,  // INT_PTR
        string: *mut smiOCTETS  // smiOCTETS* in/out
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wsnmp32.dll")]
public static extern IntPtr SnmpStrToContext(IntPtr session, IntPtr string);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wsnmp32_SnmpStrToContext' -Namespace Win32 -PassThru
# $api::SnmpStrToContext(session, string)

#uselib "wsnmp32.dll"
#func global SnmpStrToContext "SnmpStrToContext" sptr, sptr
; SnmpStrToContext session, varptr(string)   ; 戻り値は stat
; session : INT_PTR -> "sptr"
; string : 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 SnmpStrToContext "SnmpStrToContext" sptr, var
; res = SnmpStrToContext(session, string)
; session : INT_PTR -> "sptr"
; string : 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。

; INT_PTR SnmpStrToContext(INT_PTR session, smiOCTETS* string)
#uselib "wsnmp32.dll"
#cfunc global SnmpStrToContext "SnmpStrToContext" intptr, var
; res = SnmpStrToContext(session, string)
; session : INT_PTR -> "intptr"
; string : 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")
	procSnmpStrToContext = wsnmp32.NewProc("SnmpStrToContext")
)

// session (INT_PTR), string (smiOCTETS* in/out)
r1, _, err := procSnmpStrToContext.Call(
	uintptr(session),
	uintptr(string),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT_PTR

function SnmpStrToContext(
  session: NativeInt;   // INT_PTR
  string: Pointer   // smiOCTETS* in/out
): NativeInt; stdcall;
  external 'wsnmp32.dll' name 'SnmpStrToContext';

result := DllCall("wsnmp32\SnmpStrToContext"
    , "Ptr", session   ; INT_PTR
    , "Ptr", string   ; smiOCTETS* in/out
    , "Ptr")   ; return: INT_PTR

●SnmpStrToContext(session, string) = DLL("wsnmp32.dll", "int SnmpStrToContext(int, void*)")
# 呼び出し: SnmpStrToContext(session, string)
# session : INT_PTR -> "int"
# string : 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)。