ucnv_countAvailable

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

INT ucnv_countAvailable(void);

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

Declare PtrSafe Function ucnv_countAvailable Lib "icuuc" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ucnv_countAvailable = ctypes.cdll.icuuc.ucnv_countAvailable
ucnv_countAvailable.restype = ctypes.c_int
ucnv_countAvailable.argtypes = []

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "icuuc.dll"
#func global ucnv_countAvailable "ucnv_countAvailable"
; ucnv_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 "icuuc.dll"
#cfunc global ucnv_countAvailable "ucnv_countAvailable"
; res = ucnv_countAvailable()

; INT ucnv_countAvailable()
#uselib "icuuc.dll"
#cfunc global ucnv_countAvailable "ucnv_countAvailable"
; res = ucnv_countAvailable()

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procucnv_countAvailable = icuuc.NewProc("ucnv_countAvailable")
)

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

function ucnv_countAvailable: Integer; cdecl;
  external 'icuuc.dll' name 'ucnv_countAvailable';

result := DllCall("icuuc\ucnv_countAvailable", "Cdecl Int")

●ucnv_countAvailable() = DLL("icuuc.dll", "int ucnv_countAvailable()")
# 呼び出し: ucnv_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。