GetNetworkParams

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

WIN32_ERROR GetNetworkParams(
    FIXED_INFO_W2KSP1* pFixedInfo,   // optional
    DWORD* pOutBufLen
);

<DllImport("IPHLPAPI.dll", ExactSpelling:=True)>
Public Shared Function GetNetworkParams(
    pFixedInfo As IntPtr,   ' FIXED_INFO_W2KSP1* optional, out
    ByRef pOutBufLen As UInteger   ' DWORD* in/out
) As UInteger
End Function

' pFixedInfo : FIXED_INFO_W2KSP1* optional, out
' pOutBufLen : DWORD* in/out
Declare PtrSafe Function GetNetworkParams Lib "iphlpapi" ( _
    ByVal pFixedInfo As LongPtr, _
    ByRef pOutBufLen As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetNetworkParams = ctypes.windll.iphlpapi.GetNetworkParams
GetNetworkParams.restype = wintypes.DWORD
GetNetworkParams.argtypes = [
    ctypes.c_void_p,  # pFixedInfo : FIXED_INFO_W2KSP1* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pOutBufLen : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IPHLPAPI.dll')
GetNetworkParams = Fiddle::Function.new(
  lib['GetNetworkParams'],
  [
    Fiddle::TYPE_VOIDP,  # pFixedInfo : FIXED_INFO_W2KSP1* optional, out
    Fiddle::TYPE_VOIDP,  # pOutBufLen : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iphlpapi")]
extern "system" {
    fn GetNetworkParams(
        pFixedInfo: *mut FIXED_INFO_W2KSP1,  // FIXED_INFO_W2KSP1* optional, out
        pOutBufLen: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("IPHLPAPI.dll")]
public static extern uint GetNetworkParams(IntPtr pFixedInfo, ref uint pOutBufLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IPHLPAPI_GetNetworkParams' -Namespace Win32 -PassThru
# $api::GetNetworkParams(pFixedInfo, pOutBufLen)

#uselib "IPHLPAPI.dll"
#func global GetNetworkParams "GetNetworkParams" sptr, sptr
; GetNetworkParams varptr(pFixedInfo), varptr(pOutBufLen)   ; 戻り値は stat
; pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "sptr"
; pOutBufLen : DWORD* 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 "IPHLPAPI.dll"
#cfunc global GetNetworkParams "GetNetworkParams" var, var
; res = GetNetworkParams(pFixedInfo, pOutBufLen)
; pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "var"
; pOutBufLen : DWORD* 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。

; WIN32_ERROR GetNetworkParams(FIXED_INFO_W2KSP1* pFixedInfo, DWORD* pOutBufLen)
#uselib "IPHLPAPI.dll"
#cfunc global GetNetworkParams "GetNetworkParams" var, var
; res = GetNetworkParams(pFixedInfo, pOutBufLen)
; pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "var"
; pOutBufLen : DWORD* 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 (
	iphlpapi = windows.NewLazySystemDLL("IPHLPAPI.dll")
	procGetNetworkParams = iphlpapi.NewProc("GetNetworkParams")
)

// pFixedInfo (FIXED_INFO_W2KSP1* optional, out), pOutBufLen (DWORD* in/out)
r1, _, err := procGetNetworkParams.Call(
	uintptr(pFixedInfo),
	uintptr(pOutBufLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetNetworkParams(
  pFixedInfo: Pointer;   // FIXED_INFO_W2KSP1* optional, out
  pOutBufLen: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'GetNetworkParams';

result := DllCall("IPHLPAPI\GetNetworkParams"
    , "Ptr", pFixedInfo   ; FIXED_INFO_W2KSP1* optional, out
    , "Ptr", pOutBufLen   ; DWORD* in/out
    , "UInt")   ; return: WIN32_ERROR

●GetNetworkParams(pFixedInfo, pOutBufLen) = DLL("IPHLPAPI.dll", "dword GetNetworkParams(void*, void*)")
# 呼び出し: GetNetworkParams(pFixedInfo, pOutBufLen)
# pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "void*"
# pOutBufLen : DWORD* 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)。