ucol_getRules

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

WORD* ucol_getRules(
    const UCollator* coll,
    INT* length
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucol_getRules(
    ByRef coll As IntPtr,   ' UCollator*
    ByRef length As Integer   ' INT* in/out
) As IntPtr
End Function

' coll : UCollator*
' length : INT* in/out
Declare PtrSafe Function ucol_getRules Lib "icuin" ( _
    ByRef coll As LongPtr, _
    ByRef length As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ucol_getRules = ctypes.cdll.icuin.ucol_getRules
ucol_getRules.restype = ctypes.c_void_p
ucol_getRules.argtypes = [
    ctypes.c_void_p,  # coll : UCollator*
    ctypes.POINTER(ctypes.c_int),  # length : INT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
ucol_getRules = Fiddle::Function.new(
  lib['ucol_getRules'],
  [
    Fiddle::TYPE_VOIDP,  # coll : UCollator*
    Fiddle::TYPE_VOIDP,  # length : INT* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn ucol_getRules(
        coll: *const isize,  // UCollator*
        length: *mut i32  // INT* in/out
    ) -> *mut u16;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "icuin.dll"
#func global ucol_getRules "ucol_getRules" sptr, sptr
; ucol_getRules coll, varptr(length)   ; 戻り値は stat
; coll : UCollator* -> "sptr"
; length : INT* 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 ucol_getRules "ucol_getRules" int, var
; res = ucol_getRules(coll, length)
; coll : UCollator* -> "int"
; length : INT* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; WORD* ucol_getRules(UCollator* coll, INT* length)
#uselib "icuin.dll"
#cfunc global ucol_getRules "ucol_getRules" int, var
; res = ucol_getRules(coll, length)
; coll : UCollator* -> "int"
; length : INT* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procucol_getRules = icuin.NewProc("ucol_getRules")
)

// coll (UCollator*), length (INT* in/out)
r1, _, err := procucol_getRules.Call(
	uintptr(coll),
	uintptr(length),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WORD*

function ucol_getRules(
  coll: Pointer;   // UCollator*
  length: Pointer   // INT* in/out
): Pointer; cdecl;
  external 'icuin.dll' name 'ucol_getRules';

result := DllCall("icuin\ucol_getRules"
    , "Ptr", coll   ; UCollator*
    , "Ptr", length   ; INT* in/out
    , "Cdecl Ptr")   ; return: WORD*

●ucol_getRules(coll, length) = DLL("icuin.dll", "void* ucol_getRules(void*, void*)")
# 呼び出し: ucol_getRules(coll, length)
# coll : UCollator* -> "void*"
# length : INT* 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。