udat_get2DigitYearStart

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

DOUBLE udat_get2DigitYearStart(
    const void** fmt,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udat_get2DigitYearStart(
    fmt As IntPtr,   ' void**
    ByRef status As Integer   ' UErrorCode* in/out
) As Double
End Function

' fmt : void**
' status : UErrorCode* in/out
Declare PtrSafe Function udat_get2DigitYearStart Lib "icuin" ( _
    ByVal fmt As LongPtr, _
    ByRef status As Long) As Double
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

udat_get2DigitYearStart = ctypes.cdll.icuin.udat_get2DigitYearStart
udat_get2DigitYearStart.restype = ctypes.c_double
udat_get2DigitYearStart.argtypes = [
    ctypes.c_void_p,  # fmt : void**
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_get2DigitYearStart = Fiddle::Function.new(
  lib['udat_get2DigitYearStart'],
  [
    Fiddle::TYPE_VOIDP,  # fmt : void**
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_DOUBLE, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_get2DigitYearStart(
        fmt: *const *const (),  // void**
        status: *mut i32  // UErrorCode* in/out
    ) -> f64;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern double udat_get2DigitYearStart(IntPtr fmt, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_get2DigitYearStart' -Namespace Win32 -PassThru
# $api::udat_get2DigitYearStart(fmt, status)

#uselib "icuin.dll"
#func global udat_get2DigitYearStart "udat_get2DigitYearStart" sptr, sptr
; udat_get2DigitYearStart fmt, status   ; 戻り値は stat
; fmt : void** -> "sptr"
; status : UErrorCode* 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 "icuin.dll"
#cfunc global udat_get2DigitYearStart "udat_get2DigitYearStart" sptr, int
; res = udat_get2DigitYearStart(fmt, status)
; fmt : void** -> "sptr"
; status : UErrorCode* in/out -> "int"

; DOUBLE udat_get2DigitYearStart(void** fmt, UErrorCode* status)
#uselib "icuin.dll"
#cfunc global udat_get2DigitYearStart "udat_get2DigitYearStart" intptr, int
; res = udat_get2DigitYearStart(fmt, status)
; fmt : void** -> "intptr"
; status : UErrorCode* in/out -> "int"

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudat_get2DigitYearStart = icuin.NewProc("udat_get2DigitYearStart")
)

// fmt (void**), status (UErrorCode* in/out)
r1, _, err := procudat_get2DigitYearStart.Call(
	uintptr(fmt),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DOUBLE

function udat_get2DigitYearStart(
  fmt: Pointer;   // void**
  status: Pointer   // UErrorCode* in/out
): Double; cdecl;
  external 'icuin.dll' name 'udat_get2DigitYearStart';

result := DllCall("icuin\udat_get2DigitYearStart"
    , "Ptr", fmt   ; void**
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Double")   ; return: DOUBLE

●udat_get2DigitYearStart(fmt, status) = DLL("icuin.dll", "double udat_get2DigitYearStart(void*, void*)")
# 呼び出し: udat_get2DigitYearStart(fmt, status)
# fmt : void** -> "void*"
# status : UErrorCode* 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)。
# ※cdecl関数。DLL()宣言はstdcall前提。cdeclは EXEC_PTR(`cdecl`,…) を使用。