RasDialA

// RASAPI32.dll  (ANSI / -A)
#include <windows.h>

DWORD RasDialA(
    RASDIALEXTENSIONS* param0,   // optional
    LPCSTR param1,   // optional
    RASDIALPARAMSA* param2,
    DWORD param3,
    void* param4,   // optional
    HRASCONN* param5
);

<DllImport("RASAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function RasDialA(
    param0 As IntPtr,   ' RASDIALEXTENSIONS* optional
    <MarshalAs(UnmanagedType.LPStr)> param1 As String,   ' LPCSTR optional
    param2 As IntPtr,   ' RASDIALPARAMSA*
    param3 As UInteger,   ' DWORD
    param4 As IntPtr,   ' void* optional
    param5 As IntPtr   ' HRASCONN* out
) As UInteger
End Function

' param0 : RASDIALEXTENSIONS* optional
' param1 : LPCSTR optional
' param2 : RASDIALPARAMSA*
' param3 : DWORD
' param4 : void* optional
' param5 : HRASCONN* out
Declare PtrSafe Function RasDialA Lib "rasapi32" ( _
    ByVal param0 As LongPtr, _
    ByVal param1 As String, _
    ByVal param2 As LongPtr, _
    ByVal param3 As Long, _
    ByVal param4 As LongPtr, _
    ByVal param5 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

RasDialA = ctypes.windll.rasapi32.RasDialA
RasDialA.restype = wintypes.DWORD
RasDialA.argtypes = [
    ctypes.c_void_p,  # param0 : RASDIALEXTENSIONS* optional
    wintypes.LPCSTR,  # param1 : LPCSTR optional
    ctypes.c_void_p,  # param2 : RASDIALPARAMSA*
    wintypes.DWORD,  # param3 : DWORD
    ctypes.POINTER(None),  # param4 : void* optional
    ctypes.c_void_p,  # param5 : HRASCONN* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RASAPI32.dll')
RasDialA = Fiddle::Function.new(
  lib['RasDialA'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : RASDIALEXTENSIONS* optional
    Fiddle::TYPE_VOIDP,  # param1 : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # param2 : RASDIALPARAMSA*
    -Fiddle::TYPE_INT,  # param3 : DWORD
    Fiddle::TYPE_VOIDP,  # param4 : void* optional
    Fiddle::TYPE_VOIDP,  # param5 : HRASCONN* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rasapi32")]
extern "system" {
    fn RasDialA(
        param0: *mut RASDIALEXTENSIONS,  // RASDIALEXTENSIONS* optional
        param1: *const u8,  // LPCSTR optional
        param2: *mut RASDIALPARAMSA,  // RASDIALPARAMSA*
        param3: u32,  // DWORD
        param4: *mut (),  // void* optional
        param5: *mut *mut core::ffi::c_void  // HRASCONN* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RASAPI32.dll", CharSet = CharSet.Ansi)]
public static extern uint RasDialA(IntPtr param0, [MarshalAs(UnmanagedType.LPStr)] string param1, IntPtr param2, uint param3, IntPtr param4, IntPtr param5);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RASAPI32_RasDialA' -Namespace Win32 -PassThru
# $api::RasDialA(param0, param1, param2, param3, param4, param5)

#uselib "RASAPI32.dll"
#func global RasDialA "RasDialA" sptr, sptr, sptr, sptr, sptr, sptr
; RasDialA varptr(param0), param1, varptr(param2), param3, param4, param5   ; 戻り値は stat
; param0 : RASDIALEXTENSIONS* optional -> "sptr"
; param1 : LPCSTR optional -> "sptr"
; param2 : RASDIALPARAMSA* -> "sptr"
; param3 : DWORD -> "sptr"
; param4 : void* optional -> "sptr"
; param5 : HRASCONN* 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 "RASAPI32.dll"
#cfunc global RasDialA "RasDialA" var, str, var, int, sptr, sptr
; res = RasDialA(param0, param1, param2, param3, param4, param5)
; param0 : RASDIALEXTENSIONS* optional -> "var"
; param1 : LPCSTR optional -> "str"
; param2 : RASDIALPARAMSA* -> "var"
; param3 : DWORD -> "int"
; param4 : void* optional -> "sptr"
; param5 : HRASCONN* out -> "sptr"
; ※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 RasDialA(RASDIALEXTENSIONS* param0, LPCSTR param1, RASDIALPARAMSA* param2, DWORD param3, void* param4, HRASCONN* param5)
#uselib "RASAPI32.dll"
#cfunc global RasDialA "RasDialA" var, str, var, int, intptr, intptr
; res = RasDialA(param0, param1, param2, param3, param4, param5)
; param0 : RASDIALEXTENSIONS* optional -> "var"
; param1 : LPCSTR optional -> "str"
; param2 : RASDIALPARAMSA* -> "var"
; param3 : DWORD -> "int"
; param4 : void* optional -> "intptr"
; param5 : HRASCONN* out -> "intptr"
; ※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 (
	rasapi32 = windows.NewLazySystemDLL("RASAPI32.dll")
	procRasDialA = rasapi32.NewProc("RasDialA")
)

// param0 (RASDIALEXTENSIONS* optional), param1 (LPCSTR optional), param2 (RASDIALPARAMSA*), param3 (DWORD), param4 (void* optional), param5 (HRASCONN* out)
r1, _, err := procRasDialA.Call(
	uintptr(param0),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(param1))),
	uintptr(param2),
	uintptr(param3),
	uintptr(param4),
	uintptr(param5),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RasDialA(
  param0: Pointer;   // RASDIALEXTENSIONS* optional
  param1: PAnsiChar;   // LPCSTR optional
  param2: Pointer;   // RASDIALPARAMSA*
  param3: DWORD;   // DWORD
  param4: Pointer;   // void* optional
  param5: Pointer   // HRASCONN* out
): DWORD; stdcall;
  external 'RASAPI32.dll' name 'RasDialA';

result := DllCall("RASAPI32\RasDialA"
    , "Ptr", param0   ; RASDIALEXTENSIONS* optional
    , "AStr", param1   ; LPCSTR optional
    , "Ptr", param2   ; RASDIALPARAMSA*
    , "UInt", param3   ; DWORD
    , "Ptr", param4   ; void* optional
    , "Ptr", param5   ; HRASCONN* out
    , "UInt")   ; return: DWORD

●RasDialA(param0, param1, param2, param3, param4, param5) = DLL("RASAPI32.dll", "dword RasDialA(void*, char*, void*, dword, void*, void*)")
# 呼び出し: RasDialA(param0, param1, param2, param3, param4, param5)
# param0 : RASDIALEXTENSIONS* optional -> "void*"
# param1 : LPCSTR optional -> "char*"
# param2 : RASDIALPARAMSA* -> "void*"
# param3 : DWORD -> "dword"
# param4 : void* optional -> "void*"
# param5 : HRASCONN* 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)。