SnmpSendMsg

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

DWORD SnmpSendMsg(
    INT_PTR session,
    INT_PTR srcEntity,
    INT_PTR dstEntity,
    INT_PTR context,
    INT_PTR PDU
);

<DllImport("wsnmp32.dll", ExactSpelling:=True)>
Public Shared Function SnmpSendMsg(
    session As IntPtr,   ' INT_PTR
    srcEntity As IntPtr,   ' INT_PTR
    dstEntity As IntPtr,   ' INT_PTR
    context As IntPtr,   ' INT_PTR
    PDU As IntPtr   ' INT_PTR
) As UInteger
End Function

' session : INT_PTR
' srcEntity : INT_PTR
' dstEntity : INT_PTR
' context : INT_PTR
' PDU : INT_PTR
Declare PtrSafe Function SnmpSendMsg Lib "wsnmp32" ( _
    ByVal session As LongPtr, _
    ByVal srcEntity As LongPtr, _
    ByVal dstEntity As LongPtr, _
    ByVal context As LongPtr, _
    ByVal PDU 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

SnmpSendMsg = ctypes.windll.wsnmp32.SnmpSendMsg
SnmpSendMsg.restype = wintypes.DWORD
SnmpSendMsg.argtypes = [
    ctypes.c_ssize_t,  # session : INT_PTR
    ctypes.c_ssize_t,  # srcEntity : INT_PTR
    ctypes.c_ssize_t,  # dstEntity : INT_PTR
    ctypes.c_ssize_t,  # context : INT_PTR
    ctypes.c_ssize_t,  # PDU : INT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wsnmp32.dll')
SnmpSendMsg = Fiddle::Function.new(
  lib['SnmpSendMsg'],
  [
    Fiddle::TYPE_INTPTR_T,  # session : INT_PTR
    Fiddle::TYPE_INTPTR_T,  # srcEntity : INT_PTR
    Fiddle::TYPE_INTPTR_T,  # dstEntity : INT_PTR
    Fiddle::TYPE_INTPTR_T,  # context : INT_PTR
    Fiddle::TYPE_INTPTR_T,  # PDU : INT_PTR
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wsnmp32")]
extern "system" {
    fn SnmpSendMsg(
        session: isize,  // INT_PTR
        srcEntity: isize,  // INT_PTR
        dstEntity: isize,  // INT_PTR
        context: isize,  // INT_PTR
        PDU: isize  // INT_PTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wsnmp32.dll")]
public static extern uint SnmpSendMsg(IntPtr session, IntPtr srcEntity, IntPtr dstEntity, IntPtr context, IntPtr PDU);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wsnmp32_SnmpSendMsg' -Namespace Win32 -PassThru
# $api::SnmpSendMsg(session, srcEntity, dstEntity, context, PDU)

#uselib "wsnmp32.dll"
#func global SnmpSendMsg "SnmpSendMsg" sptr, sptr, sptr, sptr, sptr
; SnmpSendMsg session, srcEntity, dstEntity, context, PDU   ; 戻り値は stat
; session : INT_PTR -> "sptr"
; srcEntity : INT_PTR -> "sptr"
; dstEntity : INT_PTR -> "sptr"
; context : INT_PTR -> "sptr"
; PDU : INT_PTR -> "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 SnmpSendMsg "SnmpSendMsg" sptr, sptr, sptr, sptr, sptr
; res = SnmpSendMsg(session, srcEntity, dstEntity, context, PDU)
; session : INT_PTR -> "sptr"
; srcEntity : INT_PTR -> "sptr"
; dstEntity : INT_PTR -> "sptr"
; context : INT_PTR -> "sptr"
; PDU : INT_PTR -> "sptr"

; DWORD SnmpSendMsg(INT_PTR session, INT_PTR srcEntity, INT_PTR dstEntity, INT_PTR context, INT_PTR PDU)
#uselib "wsnmp32.dll"
#cfunc global SnmpSendMsg "SnmpSendMsg" intptr, intptr, intptr, intptr, intptr
; res = SnmpSendMsg(session, srcEntity, dstEntity, context, PDU)
; session : INT_PTR -> "intptr"
; srcEntity : INT_PTR -> "intptr"
; dstEntity : INT_PTR -> "intptr"
; context : INT_PTR -> "intptr"
; PDU : INT_PTR -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	wsnmp32 = windows.NewLazySystemDLL("wsnmp32.dll")
	procSnmpSendMsg = wsnmp32.NewProc("SnmpSendMsg")
)

// session (INT_PTR), srcEntity (INT_PTR), dstEntity (INT_PTR), context (INT_PTR), PDU (INT_PTR)
r1, _, err := procSnmpSendMsg.Call(
	uintptr(session),
	uintptr(srcEntity),
	uintptr(dstEntity),
	uintptr(context),
	uintptr(PDU),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SnmpSendMsg(
  session: NativeInt;   // INT_PTR
  srcEntity: NativeInt;   // INT_PTR
  dstEntity: NativeInt;   // INT_PTR
  context: NativeInt;   // INT_PTR
  PDU: NativeInt   // INT_PTR
): DWORD; stdcall;
  external 'wsnmp32.dll' name 'SnmpSendMsg';

result := DllCall("wsnmp32\SnmpSendMsg"
    , "Ptr", session   ; INT_PTR
    , "Ptr", srcEntity   ; INT_PTR
    , "Ptr", dstEntity   ; INT_PTR
    , "Ptr", context   ; INT_PTR
    , "Ptr", PDU   ; INT_PTR
    , "UInt")   ; return: DWORD

●SnmpSendMsg(session, srcEntity, dstEntity, context, PDU) = DLL("wsnmp32.dll", "dword SnmpSendMsg(int, int, int, int, int)")
# 呼び出し: SnmpSendMsg(session, srcEntity, dstEntity, context, PDU)
# session : INT_PTR -> "int"
# srcEntity : INT_PTR -> "int"
# dstEntity : INT_PTR -> "int"
# context : INT_PTR -> "int"
# PDU : INT_PTR -> "int"
# 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)。