InternetTimeFromSystemTimeA

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

BOOL InternetTimeFromSystemTimeA(
    const SYSTEMTIME* pst,
    DWORD dwRFC,
    LPSTR lpszTime,
    DWORD cbTime
);

<DllImport("WININET.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetTimeFromSystemTimeA(
    pst As IntPtr,   ' SYSTEMTIME*
    dwRFC As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPStr)> lpszTime As System.Text.StringBuilder,   ' LPSTR out
    cbTime As UInteger   ' DWORD
) As Boolean
End Function

' pst : SYSTEMTIME*
' dwRFC : DWORD
' lpszTime : LPSTR out
' cbTime : DWORD
Declare PtrSafe Function InternetTimeFromSystemTimeA Lib "wininet" ( _
    ByVal pst As LongPtr, _
    ByVal dwRFC As Long, _
    ByVal lpszTime As String, _
    ByVal cbTime 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

InternetTimeFromSystemTimeA = ctypes.windll.wininet.InternetTimeFromSystemTimeA
InternetTimeFromSystemTimeA.restype = wintypes.BOOL
InternetTimeFromSystemTimeA.argtypes = [
    ctypes.c_void_p,  # pst : SYSTEMTIME*
    wintypes.DWORD,  # dwRFC : DWORD
    wintypes.LPSTR,  # lpszTime : LPSTR out
    wintypes.DWORD,  # cbTime : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetTimeFromSystemTimeA = Fiddle::Function.new(
  lib['InternetTimeFromSystemTimeA'],
  [
    Fiddle::TYPE_VOIDP,  # pst : SYSTEMTIME*
    -Fiddle::TYPE_INT,  # dwRFC : DWORD
    Fiddle::TYPE_VOIDP,  # lpszTime : LPSTR out
    -Fiddle::TYPE_INT,  # cbTime : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetTimeFromSystemTimeA(
        pst: *const SYSTEMTIME,  // SYSTEMTIME*
        dwRFC: u32,  // DWORD
        lpszTime: *mut u8,  // LPSTR out
        cbTime: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool InternetTimeFromSystemTimeA(IntPtr pst, uint dwRFC, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpszTime, uint cbTime);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetTimeFromSystemTimeA' -Namespace Win32 -PassThru
# $api::InternetTimeFromSystemTimeA(pst, dwRFC, lpszTime, cbTime)

#uselib "WININET.dll"
#func global InternetTimeFromSystemTimeA "InternetTimeFromSystemTimeA" sptr, sptr, sptr, sptr
; InternetTimeFromSystemTimeA varptr(pst), dwRFC, varptr(lpszTime), cbTime   ; 戻り値は stat
; pst : SYSTEMTIME* -> "sptr"
; dwRFC : DWORD -> "sptr"
; lpszTime : LPSTR out -> "sptr"
; cbTime : DWORD -> "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 "WININET.dll"
#cfunc global InternetTimeFromSystemTimeA "InternetTimeFromSystemTimeA" var, int, var, int
; res = InternetTimeFromSystemTimeA(pst, dwRFC, lpszTime, cbTime)
; pst : SYSTEMTIME* -> "var"
; dwRFC : DWORD -> "int"
; lpszTime : LPSTR out -> "var"
; cbTime : DWORD -> "int"
; ※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。

; BOOL InternetTimeFromSystemTimeA(SYSTEMTIME* pst, DWORD dwRFC, LPSTR lpszTime, DWORD cbTime)
#uselib "WININET.dll"
#cfunc global InternetTimeFromSystemTimeA "InternetTimeFromSystemTimeA" var, int, var, int
; res = InternetTimeFromSystemTimeA(pst, dwRFC, lpszTime, cbTime)
; pst : SYSTEMTIME* -> "var"
; dwRFC : DWORD -> "int"
; lpszTime : LPSTR out -> "var"
; cbTime : DWORD -> "int"
; ※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 (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetTimeFromSystemTimeA = wininet.NewProc("InternetTimeFromSystemTimeA")
)

// pst (SYSTEMTIME*), dwRFC (DWORD), lpszTime (LPSTR out), cbTime (DWORD)
r1, _, err := procInternetTimeFromSystemTimeA.Call(
	uintptr(pst),
	uintptr(dwRFC),
	uintptr(lpszTime),
	uintptr(cbTime),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InternetTimeFromSystemTimeA(
  pst: Pointer;   // SYSTEMTIME*
  dwRFC: DWORD;   // DWORD
  lpszTime: PAnsiChar;   // LPSTR out
  cbTime: DWORD   // DWORD
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetTimeFromSystemTimeA';

result := DllCall("WININET\InternetTimeFromSystemTimeA"
    , "Ptr", pst   ; SYSTEMTIME*
    , "UInt", dwRFC   ; DWORD
    , "Ptr", lpszTime   ; LPSTR out
    , "UInt", cbTime   ; DWORD
    , "Int")   ; return: BOOL

●InternetTimeFromSystemTimeA(pst, dwRFC, lpszTime, cbTime) = DLL("WININET.dll", "bool InternetTimeFromSystemTimeA(void*, dword, char*, dword)")
# 呼び出し: InternetTimeFromSystemTimeA(pst, dwRFC, lpszTime, cbTime)
# pst : SYSTEMTIME* -> "void*"
# dwRFC : DWORD -> "dword"
# lpszTime : LPSTR out -> "char*"
# cbTime : DWORD -> "dword"
# 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)。