ucol_getSortKey

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

INT ucol_getSortKey(
    const UCollator* coll,
    const WORD* source,
    INT sourceLength,
    BYTE* result,
    INT resultLength
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucol_getSortKey(
    ByRef coll As IntPtr,   ' UCollator*
    ByRef source As UShort,   ' WORD*
    sourceLength As Integer,   ' INT
    result As IntPtr,   ' BYTE* in/out
    resultLength As Integer   ' INT
) As Integer
End Function

' coll : UCollator*
' source : WORD*
' sourceLength : INT
' result : BYTE* in/out
' resultLength : INT
Declare PtrSafe Function ucol_getSortKey Lib "icuin" ( _
    ByRef coll As LongPtr, _
    ByRef source As Integer, _
    ByVal sourceLength As Long, _
    ByVal result As LongPtr, _
    ByVal resultLength 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

ucol_getSortKey = ctypes.cdll.icuin.ucol_getSortKey
ucol_getSortKey.restype = ctypes.c_int
ucol_getSortKey.argtypes = [
    ctypes.c_void_p,  # coll : UCollator*
    ctypes.POINTER(ctypes.c_ushort),  # source : WORD*
    ctypes.c_int,  # sourceLength : INT
    ctypes.POINTER(ctypes.c_ubyte),  # result : BYTE* in/out
    ctypes.c_int,  # resultLength : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
ucol_getSortKey = Fiddle::Function.new(
  lib['ucol_getSortKey'],
  [
    Fiddle::TYPE_VOIDP,  # coll : UCollator*
    Fiddle::TYPE_VOIDP,  # source : WORD*
    Fiddle::TYPE_INT,  # sourceLength : INT
    Fiddle::TYPE_VOIDP,  # result : BYTE* in/out
    Fiddle::TYPE_INT,  # resultLength : INT
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn ucol_getSortKey(
        coll: *const isize,  // UCollator*
        source: *const u16,  // WORD*
        sourceLength: i32,  // INT
        result: *mut u8,  // BYTE* in/out
        resultLength: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int ucol_getSortKey(ref IntPtr coll, ref ushort source, int sourceLength, IntPtr result, int resultLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_ucol_getSortKey' -Namespace Win32 -PassThru
# $api::ucol_getSortKey(coll, source, sourceLength, result, resultLength)

#uselib "icuin.dll"
#func global ucol_getSortKey "ucol_getSortKey" sptr, sptr, sptr, sptr, sptr
; ucol_getSortKey coll, varptr(source), sourceLength, varptr(result), resultLength   ; 戻り値は stat
; coll : UCollator* -> "sptr"
; source : WORD* -> "sptr"
; sourceLength : INT -> "sptr"
; result : BYTE* in/out -> "sptr"
; resultLength : INT -> "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_getSortKey "ucol_getSortKey" int, var, int, var, int
; res = ucol_getSortKey(coll, source, sourceLength, result, resultLength)
; coll : UCollator* -> "int"
; source : WORD* -> "var"
; sourceLength : INT -> "int"
; result : BYTE* in/out -> "var"
; resultLength : INT -> "int"
; ※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。

; INT ucol_getSortKey(UCollator* coll, WORD* source, INT sourceLength, BYTE* result, INT resultLength)
#uselib "icuin.dll"
#cfunc global ucol_getSortKey "ucol_getSortKey" int, var, int, var, int
; res = ucol_getSortKey(coll, source, sourceLength, result, resultLength)
; coll : UCollator* -> "int"
; source : WORD* -> "var"
; sourceLength : INT -> "int"
; result : BYTE* in/out -> "var"
; resultLength : INT -> "int"
; ※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_getSortKey = icuin.NewProc("ucol_getSortKey")
)

// coll (UCollator*), source (WORD*), sourceLength (INT), result (BYTE* in/out), resultLength (INT)
r1, _, err := procucol_getSortKey.Call(
	uintptr(coll),
	uintptr(source),
	uintptr(sourceLength),
	uintptr(result),
	uintptr(resultLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ucol_getSortKey(
  coll: Pointer;   // UCollator*
  source: Pointer;   // WORD*
  sourceLength: Integer;   // INT
  result: Pointer;   // BYTE* in/out
  resultLength: Integer   // INT
): Integer; cdecl;
  external 'icuin.dll' name 'ucol_getSortKey';

result := DllCall("icuin\ucol_getSortKey"
    , "Ptr", coll   ; UCollator*
    , "Ptr", source   ; WORD*
    , "Int", sourceLength   ; INT
    , "Ptr", result   ; BYTE* in/out
    , "Int", resultLength   ; INT
    , "Cdecl Int")   ; return: INT

●ucol_getSortKey(coll, source, sourceLength, result, resultLength) = DLL("icuin.dll", "int ucol_getSortKey(void*, void*, int, void*, int)")
# 呼び出し: ucol_getSortKey(coll, source, sourceLength, result, resultLength)
# coll : UCollator* -> "void*"
# source : WORD* -> "void*"
# sourceLength : INT -> "int"
# result : BYTE* in/out -> "void*"
# resultLength : INT -> "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。