udat_toCalendarDateField

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

UCalendarDateFields udat_toCalendarDateField(
    UDateFormatField field
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udat_toCalendarDateField(
    field As Integer   ' UDateFormatField
) As Integer
End Function

' field : UDateFormatField
Declare PtrSafe Function udat_toCalendarDateField Lib "icuin" ( _
    ByVal field 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

udat_toCalendarDateField = ctypes.cdll.icuin.udat_toCalendarDateField
udat_toCalendarDateField.restype = ctypes.c_int
udat_toCalendarDateField.argtypes = [
    ctypes.c_int,  # field : UDateFormatField
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_toCalendarDateField = Fiddle::Function.new(
  lib['udat_toCalendarDateField'],
  [
    Fiddle::TYPE_INT,  # field : UDateFormatField
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_toCalendarDateField(
        field: i32  // UDateFormatField
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int udat_toCalendarDateField(int field);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_toCalendarDateField' -Namespace Win32 -PassThru
# $api::udat_toCalendarDateField(field)

#uselib "icuin.dll"
#func global udat_toCalendarDateField "udat_toCalendarDateField" sptr
; udat_toCalendarDateField field   ; 戻り値は stat
; field : UDateFormatField -> "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_toCalendarDateField "udat_toCalendarDateField" int
; res = udat_toCalendarDateField(field)
; field : UDateFormatField -> "int"

; UCalendarDateFields udat_toCalendarDateField(UDateFormatField field)
#uselib "icuin.dll"
#cfunc global udat_toCalendarDateField "udat_toCalendarDateField" int
; res = udat_toCalendarDateField(field)
; field : UDateFormatField -> "int"

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudat_toCalendarDateField = icuin.NewProc("udat_toCalendarDateField")
)

// field (UDateFormatField)
r1, _, err := procudat_toCalendarDateField.Call(
	uintptr(field),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UCalendarDateFields

function udat_toCalendarDateField(
  field: Integer   // UDateFormatField
): Integer; cdecl;
  external 'icuin.dll' name 'udat_toCalendarDateField';

result := DllCall("icuin\udat_toCalendarDateField"
    , "Int", field   ; UDateFormatField
    , "Cdecl Int")   ; return: UCalendarDateFields

●udat_toCalendarDateField(field) = DLL("icuin.dll", "int udat_toCalendarDateField(int)")
# 呼び出し: udat_toCalendarDateField(field)
# field : UDateFormatField -> "int"
# 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。