udat_countAvailable

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

INT udat_countAvailable(void);

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

Declare PtrSafe Function udat_countAvailable Lib "icuin" () 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_countAvailable = ctypes.cdll.icuin.udat_countAvailable
udat_countAvailable.restype = ctypes.c_int
udat_countAvailable.argtypes = []

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_countAvailable = Fiddle::Function.new(
  lib['udat_countAvailable'],
  [],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

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

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

#uselib "icuin.dll"
#func global udat_countAvailable "udat_countAvailable"
; udat_countAvailable   ; 戻り値は stat
; ※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_countAvailable "udat_countAvailable"
; res = udat_countAvailable()

; INT udat_countAvailable()
#uselib "icuin.dll"
#cfunc global udat_countAvailable "udat_countAvailable"
; res = udat_countAvailable()

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudat_countAvailable = icuin.NewProc("udat_countAvailable")
)

r1, _, err := procudat_countAvailable.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function udat_countAvailable: Integer; cdecl;
  external 'icuin.dll' name 'udat_countAvailable';

result := DllCall("icuin\udat_countAvailable", "Cdecl Int")

●udat_countAvailable() = DLL("icuin.dll", "int udat_countAvailable()")
# 呼び出し: udat_countAvailable()
# 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。