uloc_getISOCountries

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

CHAR** uloc_getISOCountries(void);

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

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

import ctypes
from ctypes import wintypes

uloc_getISOCountries = ctypes.cdll.icuuc.uloc_getISOCountries
uloc_getISOCountries.restype = ctypes.c_void_p
uloc_getISOCountries.argtypes = []

require 'fiddle'
require 'fiddle/import'

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

#[link(name = "icuuc")]
extern "C" {
    fn uloc_getISOCountries() -> *mut *mut i8;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "icuuc.dll"
#func global uloc_getISOCountries "uloc_getISOCountries"
; uloc_getISOCountries   ; 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 uloc_getISOCountries "uloc_getISOCountries"
; res = uloc_getISOCountries()

; CHAR** uloc_getISOCountries()
#uselib "icuuc.dll"
#cfunc global uloc_getISOCountries "uloc_getISOCountries"
; res = uloc_getISOCountries()

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	proculoc_getISOCountries = icuuc.NewProc("uloc_getISOCountries")
)

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

function uloc_getISOCountries: Pointer; cdecl;
  external 'icuuc.dll' name 'uloc_getISOCountries';

result := DllCall("icuuc\uloc_getISOCountries", "Cdecl Ptr")

●uloc_getISOCountries() = DLL("icuuc.dll", "void* uloc_getISOCountries()")
# 呼び出し: uloc_getISOCountries()
# 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。