RasGetCredentialsA

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

DWORD RasGetCredentialsA(
    LPCSTR param0,   // optional
    LPCSTR param1,
    RASCREDENTIALSA* param2
);

<DllImport("RASAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function RasGetCredentialsA(
    <MarshalAs(UnmanagedType.LPStr)> param0 As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> param1 As String,   ' LPCSTR
    param2 As IntPtr   ' RASCREDENTIALSA* in/out
) As UInteger
End Function

' param0 : LPCSTR optional
' param1 : LPCSTR
' param2 : RASCREDENTIALSA* in/out
Declare PtrSafe Function RasGetCredentialsA Lib "rasapi32" ( _
    ByVal param0 As String, _
    ByVal param1 As String, _
    ByVal param2 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

RasGetCredentialsA = ctypes.windll.rasapi32.RasGetCredentialsA
RasGetCredentialsA.restype = wintypes.DWORD
RasGetCredentialsA.argtypes = [
    wintypes.LPCSTR,  # param0 : LPCSTR optional
    wintypes.LPCSTR,  # param1 : LPCSTR
    ctypes.c_void_p,  # param2 : RASCREDENTIALSA* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RASAPI32.dll')
RasGetCredentialsA = Fiddle::Function.new(
  lib['RasGetCredentialsA'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # param1 : LPCSTR
    Fiddle::TYPE_VOIDP,  # param2 : RASCREDENTIALSA* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rasapi32")]
extern "system" {
    fn RasGetCredentialsA(
        param0: *const u8,  // LPCSTR optional
        param1: *const u8,  // LPCSTR
        param2: *mut RASCREDENTIALSA  // RASCREDENTIALSA* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RASAPI32.dll", CharSet = CharSet.Ansi)]
public static extern uint RasGetCredentialsA([MarshalAs(UnmanagedType.LPStr)] string param0, [MarshalAs(UnmanagedType.LPStr)] string param1, IntPtr param2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RASAPI32_RasGetCredentialsA' -Namespace Win32 -PassThru
# $api::RasGetCredentialsA(param0, param1, param2)

#uselib "RASAPI32.dll"
#func global RasGetCredentialsA "RasGetCredentialsA" sptr, sptr, sptr
; RasGetCredentialsA param0, param1, varptr(param2)   ; 戻り値は stat
; param0 : LPCSTR optional -> "sptr"
; param1 : LPCSTR -> "sptr"
; param2 : RASCREDENTIALSA* 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 "RASAPI32.dll"
#cfunc global RasGetCredentialsA "RasGetCredentialsA" str, str, var
; res = RasGetCredentialsA(param0, param1, param2)
; param0 : LPCSTR optional -> "str"
; param1 : LPCSTR -> "str"
; param2 : RASCREDENTIALSA* 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 RasGetCredentialsA(LPCSTR param0, LPCSTR param1, RASCREDENTIALSA* param2)
#uselib "RASAPI32.dll"
#cfunc global RasGetCredentialsA "RasGetCredentialsA" str, str, var
; res = RasGetCredentialsA(param0, param1, param2)
; param0 : LPCSTR optional -> "str"
; param1 : LPCSTR -> "str"
; param2 : RASCREDENTIALSA* 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 (
	rasapi32 = windows.NewLazySystemDLL("RASAPI32.dll")
	procRasGetCredentialsA = rasapi32.NewProc("RasGetCredentialsA")
)

// param0 (LPCSTR optional), param1 (LPCSTR), param2 (RASCREDENTIALSA* in/out)
r1, _, err := procRasGetCredentialsA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(param0))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(param1))),
	uintptr(param2),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RasGetCredentialsA(
  param0: PAnsiChar;   // LPCSTR optional
  param1: PAnsiChar;   // LPCSTR
  param2: Pointer   // RASCREDENTIALSA* in/out
): DWORD; stdcall;
  external 'RASAPI32.dll' name 'RasGetCredentialsA';

result := DllCall("RASAPI32\RasGetCredentialsA"
    , "AStr", param0   ; LPCSTR optional
    , "AStr", param1   ; LPCSTR
    , "Ptr", param2   ; RASCREDENTIALSA* in/out
    , "UInt")   ; return: DWORD

●RasGetCredentialsA(param0, param1, param2) = DLL("RASAPI32.dll", "dword RasGetCredentialsA(char*, char*, void*)")
# 呼び出し: RasGetCredentialsA(param0, param1, param2)
# param0 : LPCSTR optional -> "char*"
# param1 : LPCSTR -> "char*"
# param2 : RASCREDENTIALSA* 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)。